Why is my phone turning off and going into a coma in the middle of the night?

[Andrew Bronson]

So I'm not sure if anyone has had any of these issues before. I have an Xfinity mobile phone galaxy S8 Plus. I put my phone on the charger. When I wake up, my phone is completely off and unresponsive. Like a coma. The only way to get it on is to hit the on-off button and hold I believe the down button at the same time for about 15 seconds. I then get a black reboot reset screen with options that are in different colors asking me what I wanna do. Some of the options are do a factory reset, do a factory reset and network reset, restart your phone normally, etc. This is what it looks like at about 2:21 in the video. https://youtu.be/MsvrH-0UeAc
I don't know why this happens but it's happened twice now and I use my phone for an alarm so waking up at noon is not good.

 

[VW Maverick]

Welcome.
Out of curiosity, does it do the same thing during the night if it is not plugged into the charger?

Mav.

 

[Andrew Bronson]

It does yeah, once when it was on a charging pad and the second time when it was just on an end table. Xfinitys solution would prob be doing a factory reset on the phone to fix the problem. I could just try that.

 

[Kaushal Baruah]

it might be a defect in the phone....better return it while u still can and get it replaced..and why did u buy an Xfinity version...I bought one for 625$ and it has no problems..unlocked s8