Turn off my Iphone

To power your iPhone off, tap Settings > General > Shutdown. But if your buttons are not working, you may not be able to turn it back on. You may want to check the link above to see if it is worthwhile getting that phone repaired. I would advise backing it up before trying anything.

Turn iPhone on or off - Apple Support

How to back up your iPhone, iPad, and iPod touch - Apple Support

Yogito2022 Said:

"Turn off my Iphone: I can't turn off my iphone xs max"

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Troubleshooting a Frozen iPhone:

Start with a Force Restart:

Go Here: Force Restart iPhone - Apple Support

Try the Tips at these Apple Support Links:

• If your iPhone is Stuck on the Apple Logo - Apple Support

• If the Screen isn’t Working on your iPhone or iPad - Apple Support

• If your iPhone Won't Turn On or is Frozen - Apple Support

• If you Need More Help - iPhone - Apple Support