My phone keeps going off every 3 minutes after recent up

Thanks for getting in touch, Billdisi. We can definitely help.

If your phone keeps restarting, here is an article that will provide you steps to help fix the issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly.

If the restarting continues after following those steps, there might be more going on that needs be looked at. You can contact Apple Support directly:

Get Support.

Hope that helps!

Take care.