My iPhone 12 is shutting down always suddenly

Hi graneshwar112,

Welcome to the Apple Community.

Apple support have an article online that may (or may not) help

The article iPhone Battery and Performance"

Says:

Preventing unexpected shutdowns

With a low battery state of charge, a higher chemical age, or colder temperatures,

users are more likely to experience unexpected shutdowns. (See the article for more info.)

Complete article: https://support.apple.com/en-us/HT208387

Hope this helps you troubleshoot :-)

gnaneshwar112 Said:

"My iPhone 12 is shutting down always suddenly"

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Troubleshooting iPhone Power:

Visit the following links for tips on troubleshooting this...

I. Try what is on this Link: If your iPhone, iPad, or iPod touch won't Turn on or is Frozen - Apple Support

II. Perform a Restart:

Try Force Restarting your iPhone. Save any information that need be. Then perform the restart.

Go Here: Force Restart iPhone - Apple Support

III. A Few Apple Support Sites that May Help:

• iPhone Battery and Performance - Apple Support

• Charge and Monitor the iPhone Battery - Apple Support

• About the Battery Usage on your iPhone - Apple Support

• If your iPhone or iPod touch won't Charge -Apple Support

• About Optimized Battery Charging on your iPhone - Apple Support

• If you see "Your iPhone Battery may Need to be Serviced" - Apple Support

• Use Low Power Mode to Save Battery Life on your iPhone - Apple Support