The back cover of Apple's fourth-generation mobile phone is hot.

If it's only a minor burn, it doesn't matter. The main reason for burning is that the cpu load of mobile phone is too high. If the mobile phone burns frequently and seriously, it is suggested to solve the problem as follows:

1. Avoid playing games, watching videos or making phone calls while charging.

2. When using the mobile phone for a long time, don't put it close to your cheek, and try to use headphones or earplugs.

3. Turn off the unnecessary background programs that the mobile phone is running to reduce the burden on the mobile phone, thus reducing the fever.

4. Turn off the functions such as automatic download and automatic update of the mobile phone to reduce unnecessary program updates and installations.

5. Avoid using the mobile phone case with poor heat dissipation, or take it off when it is hot. It is best not to wear the mobile phone case when charging.

6. When the mobile phone is held in your hand or put in your pocket, it will transfer heat. Try to put it in a ventilated place at home in summer, and try to put it in your bag when you go out.

7. Don't run large mobile phone programs for a long time, and try to stop using the mobile phone during charging.