iPhone 13 Pro shuts off and on by self, fixable?

Contact Apple. Verizon folks in stores are sales people, with no technical skills. Verizon fired all of its store techs several years ago.

Click here to get started→Genius Bar Reservation and Apple Support Options - Apple

Do a forced restart:

• Press and quickly release VOLUME UP

     then

• Press and quickly release VOLUME DOWN

     then

• Hold the SIDE button until an Apple logo appears (15-30 seconds), ignoring "slide to power off" if it appears

The operative word here is QUICKLY; and try it a couple of times, the timing is a little tricky.

If it continues, and Maximum Capacity is over 80%, the next step would be to restore the phone to factory settings.

It is very possible that the connector between the battery and phone is loose. Scheduling a Genius Bar appointment would be a great step, and you aren't charged unless you decide to act on their advice.

[Link Edited by Moderator]

RoadRunnerSD wrote:

It is very possible that the connector between the battery and phone is loose. Scheduling a Genius Bar appointment would be a great step, and you aren't charged unless you decide to act on their advice.

That is impossible, based on way batteries are installed, unless the phone has been worked on by an incompetent technician. The connector is held in with 2 screws.

That is not normal; it may indicate a failing battery. Go to Settings/Battery/Battery Health; what is the maximum capacity, and is there a message that battery may be degraded?