Iphone
I am using 5s recently I am facing over heating issues when mobile data is on.
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Hello,
Your device might get warm
When you use the device or charge the battery, the device might get warm. You might notice that your device feels warmer in these situations:
- When you set up your device the first time
- When you restore from a backup
- When apps reindex or reanalyze data, like Photos tagging for faces, places, or keywords after a software update
- When you use graphics-intensive or augmented-reality apps or features
These conditions are normal, and your device will return to a regular temperature when complete.
Here are some of the higher ambient-temperature conditions and activities that might cause the device to change performance and behavior:
- Leaving the device in a car on a hot day.
- Leaving the 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.
From:
Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures - Apple Support