Why has my phone stuck and I can not change the screen or turn it on or off?

[Windows Central Question]

phone is stuck can not change screen or turn on or off

Can not go back to the start screen. Also unable to turn phone on or off. Can receive calls in my car but phone does not ring, goes right to voice mail

 

[Funky Cricket]

Re: phone is stuck can not change screen or turn on or off

hold power and volume down until it reboots.