my phone is stuck on updating

Try and Force Restart your iPhone EXACTLY as shown below and see whether that resolves the issue:

• Press and quickly release Volume UP button
• Press and quickly release Volume DOWN button
• Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF). 

Axel F.

anastasiaaa8765 Said:

"my phone is stuck on updating: it’s saying verifying updates for hours. can’t even restart. Any ideas?"

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Update Using a Computer:

Plug you computer into a computer, and then perform the update, once more. Use my User Tip:  Update your iPhone Using a Computer - User Tip