Apple's mobile phone uses iOS system, and the system itself has done a lot of optimization on junk files and memory system, so it is not necessary to clean up memory and junk files frequently. However, when the mobile phone runs slowly, you can consider using the following methods to optimize the cleaning.

1. Double-click the Home button below the iPhone to open the background running bar, press and hold an icon in the bar until it shakes, click the symbol number "a horizontal circle in the red circle" in the upper left corner of the icon to delete the background running software, and press the Home button to reply when finished. Deleting background running programs will help improve the running speed of iPhone and save electricity and traffic.

There are many junk files in the system. Basically, the system used by iPhone will not leave too many junk files. However, if the iPhone is found to be occupied by junk files, it is recommended to refresh or upgrade the system correctly to remove the junk.

3. The software can't be opened. It may be that after the system is upgraded, the software does not support the new system, which can be solved by software update.

4. If the iPhone has not been turned off, restart the Apple iDevice (all devices in the iOS system should be the same, and regular restart is very important for maintaining the devices.

5. Apple has opened permissions to some housekeepers, which can optimize mobile phones.