my iphone 12 keeps restarting ever minute

Please follow the steps in the following link for support with this issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly

Noragene Said:

"my iphone 12 keeps restarting ever minute: after most recent ios update to 15.5 about a week or two later my iphone 12 pro keeps shutting off every minute and is unusable any suggestions"

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Being Stuck in a Boot Loop:

Your iPhone is stuck in a boot loop. This typically happens when you unsuccessfully download somethings or an install stalls.

So, refer to my User Tip: How to Fix an iPhone in a Boot Loop - User Tip