my iPhone 11 does not restart

Perform a Forced Restart on the phone. Follow the instructions very carefully, as this is a bit tricky. You may need to repeat this several times.

Force restart iPhone - Apple Support

There are only 2 possible results when you perform a Forced Restart:

1) The phone returns to normal operation

2) There is a hardware problem with the phone that will need attention at the Apple Store (make an appointment) or visit an authorized Apple Service shop

Find Locations

Mialia123 Said:

"My iPhone 11 will not allow me to restart"

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Troubleshooting a Frozen iPhone:

A. Start with a Force Restart:

Go Here: Force Restart iPhone - Apple Support

B. 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

C. Being Stuck in a Boot Loop:

Your iPhone might be stuck in a boot loop. This typically happens when you unsuccessfully download something or an update stalls.  So, refer to my User Tip: How to Fix an iPhone in a Boot Loop - Apple Support