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Samsung Galaxy S4 - " Sim card not detected - reboot "

Tags:
  • Galaxy S
  • SIM Card
  • Samsung
Last response: in Android Smartphones
June 24, 2014 6:11:40 PM

Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?

More about : samsung galaxy sim card detected reboot

a b Ô Samsung
June 25, 2014 6:54:52 AM

You can try to use another SIM card.
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November 21, 2014 8:55:49 AM

shahbaz200 said:
You can try to use another SIM card.

Another sim card wont work. I just put a new 32 gb in and it still does it. Im gonna send it to samsung and let them deal w/it..
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November 26, 2014 7:26:53 AM

Hi,

I had the same problem and tried everything (inserted a new sim, cleaned the partition cache, read endless posts, etc...)
Now I have installed this free App called "Bluetooth connect & Play"

(I'm not related to this App in any way) and since then, I don't get any reboots

My guess is that there is something wrong with the Bluetooth software in the S4.

Please let me know if that helped you out.

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January 17, 2015 8:54:42 AM

I have had this problem with my galaxy s4 and I only had it for 3 months. Constantly my phone would restart all day to the point when I would cut my phone back on it would only say no sim card emergency calls only. 2 things I did was
1: before cutting the phone back on regular I would hold the power button and the volume button until a blue message pops up in the left corner than I would clear partition cache and than reboot the system that would work for two days and than It would mess up again.
2. I would cut the phone off , cut it back on , while the phone was cutting on I would non stop press on the home screen button until the phone goes in safe mode when the phone is on I would go to settings , home screen mode and click on easy mode than I would immediate restart the phone and that worked very well for weeks. When my phone started acting up again I completely got a new Sims card. When the new Sims card was acting up in the phone I realized the card wasn't the problem it was the phone. I called AT&T they said it was a system hardware problem and the sent a new s4 out and the old Sims card been working perfectly fine with the new phone.
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February 4, 2015 1:22:50 PM

There is confusion here between SD card and the SIM card. The SD card is for storage and the SIM card identifies you on the carrier's network as a valid customer.
I have this same issue with the SIM card. I had TMobile replace the SIM card and the new one has the same problem. A week later and it reboots 6 or 8 times a day. I believe replacing the phone is the only solution. I did not try installing the bluetooth application recommended by another poster, but I really find it hard to believe that would work.

Aberardo said:
shahbaz200 said:
You can try to use another SIM card.

Another sim card wont work. I just put a new 32 gb in and it still does it. Im gonna send it to samsung and let them deal w/it..


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February 12, 2015 8:40:45 AM

Hello
It's a hardware issue not the sim card. Use your warranty and get the phone replaced or fixed. Might also be caused by excess heat from gaming. I noticed it happens to my phone when Im playing some high paced game apps.
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February 14, 2015 7:46:57 AM

There is a bad batch of s4's out there that are known to have this issue. Talking to the warranty department of your carrier they can identify if your imei falls in the range of this batch and get you a new one. It had nothing to do with the sim card, it's a hardware issue.
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February 16, 2015 1:54:57 AM

Justin5609 said:
Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?


Having the very same issue. Have you resolved this issue with your phone and, if so, how...? Thanks in advance.
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February 20, 2015 10:04:40 AM

I have T-Mobile. Tried a new SIM didnt work. Had them send me a "new" Phone and used the new sim. Still giving me crap. I think it may be a problem with the latest Update.
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February 20, 2015 10:28:38 AM

ddiz said:
There is a bad batch of s4's out there that are known to have this issue. Talking to the warranty department of your carrier they can identify if your imei falls in the range of this batch and get you a new one. It had nothing to do with the sim card, it's a hardware issue.


You're right if the last 6 of your IMEI number falls in the following range you're at Risk.
000001-585557
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February 22, 2015 8:02:33 AM

Justin5609 said:
Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?


I have researched this issue for days. I have tried the following fixes:

-clear cache from recovery
-tried 3 different Sims
-factory reset

None of the above worked.

What did WORK was the following:

-I folded a small piece of paper multiple times And placed it to the left of the flash on the back of the phone then put the cover on. This creates pressure on that spot.

I have not had the issue for 2 days now, compared to 5 times daily.

This is definitely a hardware issue
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February 23, 2015 2:48:37 AM

same problem last few days except mine wont wwork at all now brought it to repair shop and they don't know what to do have you solved it yet?
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February 24, 2015 3:37:10 PM

Found the solution to this issue as I was having it also and it worked like a charm.

I take no credit for it and am only passing it along.

"applying pressure where the SIM/SD Card reader RIBBON is what makes the fix work, not the SIM card tray itself...

It doesn't really matter what you use, however I used a cut up piece of foam (earplug) to apply pressure to the area with the ribbon. My foam was about 0.4cm thick. See the below photo and please note that it was taken with a webcam so the orientation is reversed to what it really looks like."

http://forums.androidcentral.com/attachments/samsung-ga...

The cheap soft foam earplugs work great because they apply even pressure to the right spot. Also it can be cut over thick and it still compresses perfectly to just the right size.

http://www.cvs.com/shop/personal-care/ear-care/ear-plug...
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February 25, 2015 11:39:24 AM

pxkxb said:
Justin5609 said:
Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?


I have researched this issue for days. I have tried the following fixes:

-clear cache from recovery
-tried 3 different Sims
-factory reset

None of the above worked.

What did WORK was the following:

-I folded a small piece of paper multiple times And placed it to the left of the flash on the back of the phone then put the cover on. This creates pressure on that spot.

I have not had the issue for 2 days now, compared to 5 times daily.

This is definitely a hardware issue


^THIS IS THE BEST ANSWER, THANK YOU!

I tried all the software recommendations and multiple sim cards but it's definitely a hardware issue. I folded a small piece of paper 3 times to resemble a square and placed it on top of the sim card slot.

You have to hold it down in place as you put your phone cover back on so it stays directly on top. The pressure of the cover does the rest, as soon as I turned on my phone again I got my mobile service back. Thank you!!
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March 2, 2015 6:27:12 AM

(((The Best solution )))

Just put & stretch out clear scotch tape on where the sim card goes. I noticed tape was on it before. That is all you need to do. & my cell accepted the sim right away. Please let me know if this works for you.
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March 4, 2015 11:41:00 AM

This has been working for me.

Samsung support will not do anything about the issue if your phone is past its year warranty.



Ola222 said:
Found the solution to this issue as I was having it also and it worked like a charm.

I take no credit for it and am only passing it along.

"applying pressure where the SIM/SD Card reader RIBBON is what makes the fix work, not the SIM card tray itself...

It doesn't really matter what you use, however I used a cut up piece of foam (earplug) to apply pressure to the area with the ribbon. My foam was about 0.4cm thick. See the below photo and please note that it was taken with a webcam so the orientation is reversed to what it really looks like."

http://forums.androidcentral.com/attachments/samsung-ga...

The cheap soft foam earplugs work great because they apply even pressure to the right spot. Also it can be cut over thick and it still compresses perfectly to just the right size.

http://www.cvs.com/shop/personal-care/ear-care/ear-plug...


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March 6, 2015 12:25:41 PM

I can also confirm that applying pressure where the SIM/SD Card reader RIBBON is what makes the fix work, not the SIM card tray itself. This fix worked with a friend's S4 which was having the exact same issue. Mine has been working fine for about a month or so (previously it was having the SIM card error multiple times daily).

It doesn't really matter what you use, however I used a cut up piece of foam (earplug) to apply pressure to the area with the ribbon. My foam was about 0.4cm thick.
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March 9, 2015 7:50:02 AM

I have read plenty on this and have tried all the tricks. I have BTW fixed my phone.
Here is what I have learned. I will try to cross post this to some of the other forums that have helped me. The credit for this fix and the info goes to other peoples efforts.

It appears that a certain lot of S4 phones were more susceptible to this problem. IMEI numbers with the last 6 digits in this range: 000000 - 560000.

Some of the things that I tried were - New SIM card, clearing cache, booting to safe mode (Holding Vol Up and Power) then wiping and resetting to factory. I have upgraded firmware and I have tried previous versions of firmware. I have rooted and un-rooted the phone. I have removed the SIM card and used and eraser to clean the contacts. I have used a shim (piece of business card) behind the SIM to give more pressure on the contacts.
All of these attempted did not fix my problem. They have apparently worked for other people, but not for me in this case.

What did work for me was to take the back off the phone and put a small piece of foam over the spot where the cable connector for the SIM ( and SD card ) board connects to the main board. This information and photo came from another person. He used a piece cut from a foam ear plug.

Let me make one correction, this semi worked for me, it did show improvement but still failed on occasion so I took out the screws of the grey plastic back bezel. https://www.ifixit.com/Teardown/Samsung+Galaxy+S4+Teard...
This will reveal the actual connector. I put the foam there, then replaced the bezel. When it was screwed down it really put support on the connector. The foam I used was a little too thick and made a small bump in the back of the case. It is minor and the phone works now, that is all that matters.



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March 14, 2015 1:39:48 PM

I did the "slice of earplug foam, inside the grey plastic bezel, directly on the connector" thing. Meaning, I unscrewed and took it all apart, put the foam on carefully, then carefully reassembled and screwed it all together.

For 14 days, no sim card errors. On day 14, I got my first one. Another 5 days later. Another one day after that. Sigh. Phone is out of warranty and I'm not the original owner (bought off swappa maybe 8 months ago).

Not sure what to try next. I could try an even thicker slice, though the one I used was thick enough to put good pressure down.
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March 17, 2015 3:29:50 AM

I updated to Lollipop last night and haven't had a problem since (so far). Before I couldn't have the phone on for 5mins without a problem. So maybe it's a software issue? Will let you know if it fails.



EDIT: No luck, still fails to see SIM card. Lasted 12 hours though which is a record...
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March 20, 2015 1:44:24 PM

In removing the light gray bezel inside the back cover, I noted there were several modular plugs with scores of tiny connectors beneath. (it should be noted that chrome outer bezel around perimeter of phone disconnects from the rest of the phone by snapping off as a part of the gray internal bezel) I got my hands on some electronics contact cleaner (typically freon) and lightly sprayed each connector after I carefully pried each individually loose. I gently re-pressed each one - one at a time - back into place, and repeated several times while the contact cleaner was still wet and present and not yet evaporated. This should have shined up each contact and it's corresponding socket receptor. There were 5 or 6 of these ribbon cable terminal contacts all over the mother board and I repeated the process for each. They look somewhat like a centipede when you pull them up with all the tiny legs hanging down. Be very careful not to bend them when re-inserting. Press evenly across the terminal contacts surface to re-plug cable into socket. Thus far, and it's been 3 hours since having done this, no issues with SIM card again. And, it WAS losing it about every 20 minutes prior to my DNC (Dust-n-Cleaning) procedure.
Hope that helps everyone else.
- Craig -
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March 23, 2015 8:56:43 AM

DANGIT!

Getting this error on my GS4 that I just got on Ebay. Generally once or twice a day.

I did the "foam mounting tape right on top of the SIM cable connector" trick and it seems to have cut down on the occurences, although I got one yesterday after taking from my pocket. I thought it was due to bending etc from being in pocket.

THIS MORNING MY PHONE HAS BEEN SITTING QUIETLY ON MY DESK, NO MOVEMENT, and I just picked it up to find the SIM error. WTF????? I feel like this could be a software-based issue. How could I get the error when the phone was sitting quietly on a desk?
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March 25, 2015 10:33:01 PM

I have been experiencing the same problem. I sent my phone for repair under warranty and it arrived back today with a note saying it had been tested with no fault found. They also noted a software upgrade was done. On review of the phone operating system it appears they have returned the phone to the Android 4.3 operating system so maybe a downgrade would have been more accurate a description. I have lost some functionality including hiding and unhiding items e.g. pictures. It has been operating for several hours now without a hitch but I still have a pending sense of doom. It may just be a software conflict issue and a downgrade to Android 4.3 may be the fix. Will keep you posted.

hogan773 said:
DANGIT!

Getting this error on my GS4 that I just got on Ebay. Generally once or twice a day.

I did the "foam mounting tape right on top of the SIM cable connector" trick and it seems to have cut down on the occurences, although I got one yesterday after taking from my pocket. I thought it was due to bending etc from being in pocket.

THIS MORNING MY PHONE HAS BEEN SITTING QUIETLY ON MY DESK, NO MOVEMENT, and I just picked it up to find the SIM error. WTF????? I feel like this could be a software-based issue. How could I get the error when the phone was sitting quietly on a desk?


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March 26, 2015 7:44:24 AM

Justin5609 said:
Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?


I started seeing this on my S4 starting maybe a week and half ago. I'm still on jelly bean, because the kitkat update always fails in the middle. Haven't found any good solutions yet... I'm planning on just hanging on until I can get a new phone :-/
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March 26, 2015 8:39:12 AM

Believe it or not this is not a software issue. It is a hardware issue. I finally found out what the issue was. Adding tape to the sim card does not fix this problem. On some S4 models, it is mounted differently. I actually have to see the phone but keep in mind that his worked for 3 out of 4 phones. Its really hard to explain. I don't want you send me the phone and def do not expect anyone to travel a long time to me. This is an issue that Samsung or phone companies have never resolved. If you are in Toronto area, it may be worth the trip. Even if the "Fix" does not work, It wouldn't do any damage to the phone.
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March 26, 2015 1:41:12 PM

Ola222 said:
Found the solution to this issue as I was having it also and it worked like a charm.

I take no credit for it and am only passing it along.

"applying pressure where the SIM/SD Card reader RIBBON is what makes the fix work, not the SIM card tray itself...

It doesn't really matter what you use, however I used a cut up piece of foam (earplug) to apply pressure to the area with the ribbon. My foam was about 0.4cm thick. See the below photo and please note that it was taken with a webcam so the orientation is reversed to what it really looks like."

http://forums.androidcentral.com/attachments/samsung-ga...

The cheap soft foam earplugs work great because they apply even pressure to the right spot. Also it can be cut over thick and it still compresses perfectly to just the right size.

http://www.cvs.com/shop/personal-care/ear-care/ear-plug...


DonnyC said:
Believe it or not this is not a software issue. It is a hardware issue. I finally found out what the issue was. Adding tape to the sim card does not fix this problem. On some S4 models, it is mounted differently. I actually have to see the phone but keep in mind that his worked for 3 out of 4 phones. Its really hard to explain. I don't want you send me the phone and def do not expect anyone to travel a long time to me. This is an issue that Samsung or phone companies have never resolved. If you are in Toronto area, it may be worth the trip. Even if the "Fix" does not work, It wouldn't do any damage to the phone.


Where exactly in Toronto and what is the process I'm in kitchener email is redacted
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March 31, 2015 8:58:46 AM

@ DonnyC is your solution basically some form of applying more pressure to the area where the sim card CABLE attaches to the motherboard? Just curious

So I added a small square of mounting tape directly above that attachment point. It is just below and to the left of the camera flash. When the back is closed, it pushes down on that area more. This seemed to lower the frequency of incidences.

Over the weekend I was getting a lot of the errors again as my phone gets put in my jeans pocket on top of my wallet (yes I am a front pocket wallet guy with a skinny wallet). My theory is that this physically flexes the phone and may jostle whatever inside the phone enough to momentarily disrupt the SIM contact either at the SIM itself or at the connector of the cable to the mobo.

I would often pull the phone out of my pocket and it would be waiting for me to reboot. Every time I rebooted it found the SIM and was normal again.

SO I tried adding some paper to the back of the SIM card to add more pressure in there. That seemed to be a bad idea, as the errors didn't stop. Actually THEN I was getting errors even on Sunday night just picking up the phone from my nightstand. Lots of them. Ugh.

Took the paper out Monday morning and did a WIPE CACHE from the recovery menu. Haven't had a problem since then. I'm sure typing this will jinx me into having one again!

My last try would be to open the plastic shell to expose the guts of the phone and then put my mounting tape directly on top of that connector. I'm holding off doing that because I'd prefer not to open up the phone and I'm not sure whether jamming down that connector into the socket is really a good idea for the long term.

The random errors that were coming while the phone was just sitting on the nightstand with the paper inside the SIM holder really had me confused. And the fact that thing seem better after doing a cache wipe also have me confused.

It's aggravating but I like the S4. The other thing is if you google you can see the S5 also has this error so I don't know that paying more to Ebay an S5 will fix anything.

Help?

Anyway let us know your fix if possible. I don't think most people can fly to Toronto to meet you in person.

Thanks
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March 31, 2015 1:21:15 PM

VO Knows said:
ddiz said:
There is a bad batch of s4's out there that are known to have this issue. TVTalking to the warranty department of your carrier they can identify if your imei falls in the range of this batch and get you a new one. It had nothing to do with the sim card, it's a hardware issue.


You're right if the last 6 of your IMEI number falls in the following range you're at Risk.
000001-585557


Will samsung replace thus for free they are telling me since its not on the samsung site its not correct info and i have to pay for repair.
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March 31, 2015 3:24:49 PM

mark33180 said:
VO Knows said:
ddiz said:
There is a bad batch of s4's out there that are known to have this issue. TVTalking to the warranty department of your carrier they can identify if your imei falls in the range of this batch and get you a new one. It had nothing to do with the sim card, it's a hardware issue.


You're right if the last 6 of your IMEI number falls in the following range you're at Risk.
000001-585557


Will samsung replace thus for free they are telling me since its not on the samsung site its not correct info and i have to pay for repair.


If the phone is out of warranty I highly doubt Samsung will pay for it.

there are numerous posts here and elsewhere of people IN WARRANTY sending their phones back and forth with Samsung and not really getting them fixed either.

I wish we knew exactly what is causing this. So much speculation and so many home remedies that sometimes work and sometimes don't seem to.
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April 1, 2015 10:50:41 AM

Can anyone tell me where to find the IMEI number on my phone ?
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April 1, 2015 12:22:08 PM

Massagemom said:
Can anyone tell me where to find the IMEI number on my phone ?


-SETTINGS
-MORE
-ABOUT DEVICE
-STATUS

and then you'll see it on that screen
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April 2, 2015 11:26:37 AM

I do not like this throw away world, which is why il let you know how to repair yourself because taking it to a shop will cost more than the phone itself!

I have found that if you have never opened up the phone and never touch the SIM. The Charging Dock Port, is the number 1 fault. If that does not work, replace the SIM Card Tray.

Everything can be purchased on Ebay and instructions on Youtube.

Just work with care and be careful not to crimp the antenna cable when putting it all back together.

Please note, only do this if it is not covered under warranty! Because it will void your warranty.

Good Luck :-)



Justin5609 said:
Has anyone else had an issue with their Galaxy S4 constantly coming up as the sim card not being detected and having to reboot?

My phone started doing it on the very odd occasion, but now it seems to do it 12+ times a day, sometimes 4 or 5 times in a row on a bad day. Sim card isn't loose. Works fine after a reboot (most of the time, sometimes keeps having to reboot).

Seems to happen more often since I upgraded to KitKat, but might be irrelevant. Google doesn't seem to help besides sending it off for repair which I'm pretty close to doing. Has anyone found any solutions besides?


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April 2, 2015 8:35:51 PM

AlainLetzebuerg said:
Hi,

I had the same problem and tried everything (inserted a new sim, cleaned the partition cache, read endless posts, etc...)
Now I have installed this free App called "Bluetooth connect & Play"

(I'm not related to this App in any way) and since then, I don't get any reboots

My guess is that there is something wrong with the Bluetooth software in the S4.

Please let me know if that helped you out.



denis408 said:
There is confusion here between SD card and the SIM card. The SD card is for storage and the SIM card identifies you on the carrier's network as a valid customer.
I have this same issue with the SIM card. I had TMobile replace the SIM card and the new one has the same problem. A week later and it reboots 6 or 8 times a day. I believe replacing the phone is the only solution. I did not try installing the bluetooth application recommended by another poster, but I really find it hard to believe that would work.

Aberardo said:
shahbaz200 said:
You can try to use another SIM card.

Another sim card wont work. I just put a new 32 gb in and it still does it. Im gonna send it to samsung and let them deal w/it..




I installed that app, rebooted my phone and I haven't had a problem since. Thanks a lot man
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April 6, 2015 9:11:43 AM

My errors seemed to be VERY correlated with times when I would carry the phone along with my wallet in front jeans pocket. I tried the "foam on top of the area where the connector attaches - foam on the OUTSIDE of the plastic shield over the mobo" and it cut down on the errors but didn't eliminate.

Last night I tried opening up the phone by taking off the 9 screws etc. This time I placed the foam mounting tape directly on top of that ribbon connector and then screwed everything back down. Kept the phone in jeans pocket rest of the evening and knock on wood didnt get any errors. Haven't had long enough to issue my proof but I am really hoping this does the trick. I will say that when I lifted off the ribbon connector to try to reseat it, it seemed like it only "clicked" on one side and never really had a positive click on the other. Maybe it is slightly loose and when the phone flexes while jammed into my jeans, it is enough to come temporarily off the connection for just a second which trips the sim card error.

Like others with the "guitar pick" fix I'm hoping that the screwed down case combined with the foam will create a constant pressure that isn't relieved when the phone does any jeans flexing.....

fingers and toes crossed.....I really like this phone and don't want to have to abandon it over this silly design issue. I'm wondering whether later runs of the S4 (beyond that "risk zone" IMEI numbers) have a better ribbon connector that locks down better?
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April 7, 2015 6:09:10 PM

VO Knows said:
ddiz said:
There is a bad batch of s4's out there that are known to have this issue. Talking to the warranty department of your carrier they can identify if your imei falls in the range of this batch and get you a new one. It had nothing to do with the sim card, it's a hardware issue.


You're right if the last 6 of your IMEI number falls in the following range you're at Risk.
000001-585557


Mine is not in that range and I have that trouble.
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April 7, 2015 7:55:00 PM

Continuing to touch wood so as not to jinx myself, I have had the phone in my jeans pocket on two different days and have not had the issue recur after putting the mounting foam tape INSIDE the plastic screw-down shield. I think it is a hardware issue with that ribbon connector being loose and not actually snapping down to the socket, and while putting some extra pressure on the OUTSIDE of that screw-down shield can help, it isn't as secure as putting it on the inside where the foam DIRECTLY holds the socket in place.

I can't explain why people have "fixed" the issue through various software reboots, app installations, etc, unless the SIM error can actually be caused by multiple reasons. In my case and it seems in others', the issue is a simple hardware issue. As to why Samsung didn't design that cable to actually click lock down to the board, I dunno......
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April 10, 2015 12:44:21 PM

Sprock Er said:
Hello
It's a hardware issue not the sim card. Use your warranty and get the phone replaced or fixed. Might also be caused by excess heat from gaming. I noticed it happens to my phone when Im playing some high paced game apps.


i think is from the heat ... i started to have this problem after playing the game "Champions" for 1-2 hours ...and the phone is heating very much around the sim card and sd card ...so it may be from the excess heating..
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April 11, 2015 3:52:25 PM

I had that problem (and had it one time today in I don't know how many weeks) and I tried the following:

- Clean the contacts of the SIM with an eraser.
- Change the SIM
- Change the SIM card and SD card reader (it's the same part). I actually had to do that twice as the SD card reading part was defective with the first part I installed.

Changing the SIM card and SD card reader did it for me until today when I again got that $$$@(#*@#* message...

I am definitely considering switching brands next time (ie no more Samsung...)...

Good luck!

Nick
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April 11, 2015 4:00:49 PM

Marbled said:
I had that problem (and had it one time today in I don't know how many weeks) and I tried the following:

- Clean the contacts of the SIM with an eraser.
- Change the SIM
- Change the SIM card and SD card reader (it's the same part). I actually had to do that twice as the SD card reading part was defective with the first part I installed.

Changing the SIM card and SD card reader did it for me until today when I again got that $$$@(#*@#* message...

I am definitely considering switching brands next time (ie no more Samsung...)...

Good luck!

Nick


I have been perfect for this whole week after installing the foam tape right on top of the sim connector. This includes many times with phone in jeans pocket which always was the problem.

Just pulled phone out now and had the error. Friggin A.

If it only does it once a week or less I can live with that. Will keep watching it and crossing fingers. I really like the phone and would prefer not to pay up for a GS5

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April 11, 2015 9:06:01 PM

I had the issue, as well, and it was getting worse and worse. After almost resigning myself to the fact that I'd have to get a new phone, I remembered one of my apps (transparent clock and weather) had been having intermittent problems for months & I'd upgraded, uninstalled & re-installed on several occasions. I uninstalled this app, and left it uninstalled, and I haven't had the problem since (several days).
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April 14, 2015 8:11:27 AM

Ugh. I received a replacement S4 from Squaretrade because of this issue. After having the new phone for 2 days I am now getting the same freakin error:
"Unable to detect your SIM card. Your device will restart to check for your SIM card."

Can't help but think this is software related. I have uninstalled all apps that I most recently installed. I'll post again later with my findings.

3 hours later-
so far so good.

Actions I've taken:
uninstalled SUPERSU;
uninstalled "Wi-Fi tethering widget" by Soboku Apps.
installed "Bluetooth connect & Play" by Carl Parziale (as recommended above)

Will continue to update this post.
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April 18, 2015 11:54:24 AM

The problem is that a connector on the board has come almost unplugged. Squeeze the screen and the back of the phone with your finger and thumb, right below the camera at about the 7 O'clock position.
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April 21, 2015 5:58:26 PM

This method works the best!!


Ola222 said:
Found the solution to this issue as I was having it also and it worked like a charm.

I take no credit for it and am only passing it along.

"applying pressure where the SIM/SD Card reader RIBBON is what makes the fix work, not the SIM card tray itself...

It doesn't really matter what you use, however I used a cut up piece of foam (earplug) to apply pressure to the area with the ribbon. My foam was about 0.4cm thick. See the below photo and please note that it was taken with a webcam so the orientation is reversed to what it really looks like."

http://forums.androidcentral.com/attachments/samsung-ga...

The cheap soft foam earplugs work great because they apply even pressure to the right spot. Also it can be cut over thick and it still compresses perfectly to just the right size.

http://www.cvs.com/shop/personal-care/ear-care/ear-plug...


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April 24, 2015 11:35:48 AM

I've had this same issue for months now. I was upgraded to Lollipop a few weeks ago and was hoping it would have stopped it. Sadly, it didn't. It's gotten to the point I want to toss my phone in the garbage and deal without having a phone any longer. Highly frustrating and of course, my phone is out of the 1 year warranty and Samsung won't touch it... :fou: 

Happens anywhere from once to 6 times a day. Sometimes when I restart, I don't get the error but there is a "No Sim Card" icon in the notification bar. I have tried the foam piece, only for the error to continue. I am going to give the Bluetooth app a try and see if that helps.
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April 24, 2015 2:06:15 PM

hey, I've run into similar problems many times, I work at a Cell phone shop. this is something i've found that helps most of the time

Go to settings>More>Applications Manager

Find Google Play Store

Tap, and Uninstall Updates.

That seems to fix a ton of random issues,

Including this one
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April 25, 2015 6:53:07 AM

Had the same issue on my Galaxy S4 (can not connect to SIM card). Took it to Geek Squad and they found that in my Setting>More Setting>Developer option was "on". They turned the Developer option to "off" and so far, 24 hours have gone by and no message about SIM card. Before I was getting it about every 4-6 hours and had to restate.

Well, I was wrong, it just popped up again. Headed back to the Geek Squad to get a new phone. Glad I got the insurance on my phone. Always had it, but never got to use it.
Samsung rep at the store said they just had someone come in with a Galaxy S4 note that had the same thing. Strange part was we both have AT&T.
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April 25, 2015 9:21:53 PM

I really think it is hardware-based

Mine has only happened 2 or 3 times in the past 3 weeks, and each time while in my tighter jeans pocket if I am bending hard to pick up something etc. This is with the foam piece UNDER the screwed-down plastic back. Before, it would happen about 75% of the time that I had the phone in my jeans pocket, many times per day.
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April 27, 2015 9:09:18 AM

hogan773 said:
@ DonnyC is your solution basically some form of applying more pressure to the area where the sim card CABLE attaches to the motherboard? Just curious

So I added a small square of mounting tape directly above that attachment point. It is just below and to the left of the camera flash. When the back is closed, it pushes down on that area more. This seemed to lower the frequency of incidences.

Over the weekend I was getting a lot of the errors again as my phone gets put in my jeans pocket on top of my wallet (yes I am a front pocket wallet guy with a skinny wallet). My theory is that this physically flexes the phone and may jostle whatever inside the phone enough to momentarily disrupt the SIM contact either at the SIM itself or at the connector of the cable to the mobo.

I would often pull the phone out of my pocket and it would be waiting for me to reboot. Every time I rebooted it found the SIM and was normal again.

SO I tried adding some paper to the back of the SIM card to add more pressure in there. That seemed to be a bad idea, as the errors didn't stop. Actually THEN I was getting errors even on Sunday night just picking up the phone from my nightstand. Lots of them. Ugh.

Took the paper out Monday morning and did a WIPE CACHE from the recovery menu. Haven't had a problem since then. I'm sure typing this will jinx me into having one again!

My last try would be to open the plastic shell to expose the guts of the phone and then put my mounting tape directly on top of that connector. I'm holding off doing that because I'd prefer not to open up the phone and I'm not sure whether jamming down that connector into the socket is really a good idea for the long term.

The random errors that were coming while the phone was just sitting on the nightstand with the paper inside the SIM holder really had me confused. And the fact that thing seem better after doing a cache wipe also have me confused.

It's aggravating but I like the S4. The other thing is if you google you can see the S5 also has this error so I don't know that paying more to Ebay an S5 will fix anything.

Help?

Anyway let us know your fix if possible. I don't think most people can fly to Toronto to meet you in person.

Thanks


Sorry I got back so late. I don't get updates when people reply back to me on here. first off, If the phone is new and you are not getting this option, DO NOT have the phone in your pocket unless you have a hard case that prevents the phone from bending. I fixed a few lately. If I get another phone, I will try and get a video up on how to fix it. It seems to be case by case.
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May 6, 2015 2:10:50 PM

Folding a small piece of paper and placing it to the left of the flash worked for me but its starting to happen again. It's a hardware issue. Get a new phone
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