Phone Needs to cool down

Hello fpc22,

Thanks for posting in the Apple Support Communities. We're happy to look into this with you. It sounds as though the main focus regarding this issue is that your iPhone is getting hot. If this happens, it's not uncommon for certain features or even the device, to work as expected until it's cooled off.

There is a great deal of information provided in article, If your iPhone or iPad gets too hot or too cold - Apple Support about this.

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. 

- Avoid these conditions and activities because they might change the performance of your device:

- Leaving your device in a car on a hot day.

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

- 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.

If you are receiving heat warnings, it would be a good idea to connect with Apple Support so they can take a look at the cause of this behavior. If what you experience is outside of the circumstances listed in the article above, you should reach out to them for help. You can do so at Get Support.

Best regards.