How do I fix self-restart issue on iPhone XS Max?

MrShehryar wrote:

My phone which is Iphone xsmax having issues it has been self restart after some minutes and it was from last 3to4 days and then turn on self what was the problem with it

plz tell me soon as well as possible

i,m worried about it

i,m waiting for your response

[Re-Titled by Moderator]

Original Title: Self restart issue

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User troubleshooting: Follow the 3R's- if a restart does not solve your problem proceed

Have you shutdown & restarted the iPhone ie power off/on...

Restart your iPhone - Apple Support

Reset or a Force Restart,

Force restart iPhone - Apple Support

Restore from backup, restore as new device.

Restore your iPhone, iPad, or iPod to factory settings using a computer - Apple Support

Put your iPhone in diagnostics mode - identify potential hardware and software issues

How to put your iPhone in diagnostics mode - Apple Support

no insight or resolve—

iPhone Repair and Service - Apple Support

Apple Service and Repair for iPhone - Apple Support

Honestly, I don't think you will be able to solve the problem by yourself. Service will be required.

If you can.....check the battery settings:

Settings > Battery > Battery Health & Charging

What is the Maximum Capacity that you see for the battery?

When was the last time that you replaced the battery?