what do u do when your phone wont turn on

[just_add_water_]

I was using my phone and it suddenly just shut down and it won't turn back on! The battery was at 93% (Samsung Galaxy S3)

 

[COLGeek]

Could be a defective battery (or phone). Contact your wireless carrier for assistance, especially if under warranty!

BTW, will the phone work if connected to the AC adapter?