I am having a bit of a problem. I have a Galaxy s7 that was a Verizon phone. It was switched over to Straight Talk. I updated the phones O.S with Samsung's software on my laptop. Phone works great, except if I restart my phone or power it off for any reason, when I turn it back on, I can not send texts until I make a phone call. As soon as the call connects the text goes through and then it's fine until the phone shuts off and then the same problem. I called S.T no help. I called Verizon, no help. It's not a huge deal as my phone doesn't get turned off much, but would like to see if there's any solutions.