iPhone 16 Pro Max keeps shutting down unexpectedly

1. Follow the Apple article to resolve the issue --> If your iPhone, iPad, or iPod touch won't turn on or is frozen ...
2. If not resolved, 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
3. Make sure you have the latest updates installed. Update using iTunes/Finder —> Update your iPhone, iPad, or iPod touch - Apple Support (IN)
4. You still see a black screen after charging, force restarting, and following the steps in this article.
   1. You see a black screen, but you can hear alerts, sounds, and vibrations.
   2. The screen remains black, but the device chirps when you unmute it and connect it to power.
   3. Your screen is on, but it doesn't respond when you tap, slide, or try other gestures. 
   4. You can't force your device to restart because a button is broken or stuck.
   5. Your device is stuck on the Apple logo, displays a solid color, or isn't recognized in iTunes.
   6. Contact Apple Support to set up service if you have any of the above issues:
5. Please follow the steps in the following Apple Video for support with this issue:

Did you purchase it from Apple and within 14 days, if so you can return and exchange it. If you purchased it elsewhere, contact that seller to inquire about their return policy.

Because OF shutdown I have an Appointment This Saturday afternoon

at 4pm ET Mark In Greenville. South Carolina.