why is my iphone keeps restarting itself?

Hello ameleya,

It sounds like you may have a few issues happening with your iPhone 13 Pro Max. If the iPhone is turning off by itself, does this happen when it gets warm? Do you see a temperature alert, as described here: If your iPhone, iPad, or iPod touch gets too hot or too cold

If you see a temperature warning screen

If your device exceeds a certain temperature threshold, it will present a temperature warning screen similar to this:

An iPhone showing this message might still be able to make emergency calls.

To resume use of your device as quickly as possible, turn it off, move it to a cooler environment (away from direct sunlight), and allow it to cool down.

See the following reasons this may occur:

Your device might get warm

You might notice that your device feels warmer when you:

- Set up your device the first time

- Restore from a backup

- Wirelessly charge your device

- Use graphics-intensive or processor-intensive apps, games, or features, including augmented-reality apps

- Stream high-quality video

These conditions are normal, and your device will return to a regular temperature when the process is complete or when you finish your activity. If your device doesn't display a temperature warning, you can keep using your device.

If your device gets too warm

iOS and iPadOS devices have built-in protections to prevent overheating. If the interior temperature of your device exceeds the normal operating range, your device will protect its internal components by attempting to regulate its temperature. Here are some of the higher ambient-temperature conditions and activities to avoid, because they might cause your device to change performance and behavior:

- Avoid leaving your device in a car on a hot day.

- Avoid leaving your device in direct sunlight for an extended period of time.

- Avoid using certain features in hot conditions or direct sunlight for an extended period of time, such as GPS tracking or navigation in a car, playing a graphics-intensive game, or using augmented-reality apps.

If the interior temperature of your device exceeds the normal operating range, you might notice these changes:

- Charging, including wireless charging, slows or stops.

- The display dims or goes black.

- Cellular radios enter a low-power state. The signal might weaken during this time.

- The camera flash is temporarily disabled.

- Performance slows with graphics-intensive or augmented-reality apps or features.

Additionally, if you're navigating, your device might show this alert and turn off the display: "Temperature: iPhone needs to cool down." Navigation still provides audible turn-by-turn directions. When approaching a turn, the display will illuminate to guide you through the turn.

In case you don't see these temperature alerts, but instead the Apple logo or a spinning gear as it unexpectedly shuts down and starts back up, see related steps here instead: If your iOS or iPadOS device restarts or displays the Apple logo or spinning gear unexpectedly

Hoping to hear how it goes, take care.