Mine did the SAME EXACT thing about a week ago after getting the phone.
Sent from my SAMSUNG-SM-G900A using XDA Premium 4 mobile app
Rooted Droid 3: Fiance' spilled coke on it,retired now.
Rooted Droid 4
Rooted Droid Razr
Rooted HTC Evo 3D 4G(Virgin Mobile) with unlocked bootloader!!
Rooted LG Optimus Slider(Virgin Mobile)