I fully charged my phone yesterday and after I unplugged, the power button would not respond. If my device goes to sleep, I have to plug it in or unplug it to wake it up.
Sounds like a hardware problem of some sort. Can you get the phone to power up if you pull the battery out, and put it back in, and hit the power button?
Is the iPhone X worth it? Find out why it totally is!
Find out how to track your iPhone's delivery!
Let us help you Give the Gift of AT&T Wireless this holiday season!