What to do if the phone hangs, can't be turned off and the screen is on Huawei, how can I restart it?

I would like to know how to operate the phone again, if really everything hangs. I would be very happy about an answer.

Either remove batteries or make a hard reset. The key combination for this you can google.

If you can remove the battery, remove it. If this is not possible, turn on the power switch min. Hold for 10 seconds.

Still warranty on it? From there to the dealer.

Back up data first