My phone keeps turning off

Hi chrissagay,

The best support article in this circumstance will be If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly. Follow that guide to verify your software and apps are up-to-date, and then check the hardware and battery health. If service is needed, follow the link in that article to contact Apple Support to investigate options to continue.

Regards.

"My iPhone keeps turning off after the iOS new update "

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Troubleshooting Being Stuck in a Boot Loop:

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