No messages after iOS 17.1.2 update

Sass14 Said:

"17.1.2 update: Iphone 13 promax. No messages after 17.1.2, unable to power phone off."

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Troubleshooting a Frozen iPhone:

A. Start with a Restart:

Refer to this link: Force Restart iPhone - Apple Support

B. Links to Use?

Refer the the following for troubleshooting techniques.

• If the Screen isn’t Working on your iPhone or iPad - Apple Support



• If your iPhone is Stuck on the Apple Logo - 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

iOS updates generally aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. Predictive Text issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

This seems purely coincidental so please check the Setting on your device.

You need to have an SMS/MMS plan enabled by your carrier for the SIM/eSIM that you use on your device. Apple Inc does not provide SMS/MMS services.

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...