Leslie, this just happened to me Sunday, 6/21 night. I was texting my sister and some time had gone by of not receiving her reply. I picked up the phone and the screen was completely black. I tried powering up the phone, thinking maybe the battery died and I missed the notification. I plugged it in and the red light didn't even come on indicating that it was charging. I left it plugged for about an hour, then moved it to an outlet in a different room in case something was wrong with the living room outlet... Nothing! The phone was on the charger all night and the next morning, still NOTHING. It was completely dead. I called TMobile Monday morning and they had me hold the power button, home button and the volume up buttons all at once, but again NOTHING. They couldn't figure it out either.
I loved my phone and handled it like a baby. I had recently purchased the Samsung case for the Edge in the chrome silver color, very sleek. I never dropped it, had it anywhere near fluids, etc and it just dies. I just received the replacement phone today. Hopefully, this will not happen again.