What is the cause if your phone just off itself at 3 percentage

osamangbe Said:

"What is the cause if your phone must off itself at 3 percent"

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Charge your iPhone.

For reference...

Troubleshooting iPhone Charge:

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. View the Battery Health:

Apple recommends you get a new battery, once the Battery Health reaches 80% or lower. When the Battery Health is 80% or lower, it is time for a new battery.

1. Go To: Settings
2. Tap: Battery
3. Tap: Battery Health
4. View: [the percentage]
5. Is it 80% or less?  If so, it is time for a new battery.

III. 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

IV. 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

Charge it seems like the obvious step.

The cause is you've run out of battery.