My iPhone6plus opens memos, text messages, etc. And it always crashes for a while before it flashes back. Wechat takes small videos and sometimes there is no sound.

1. Restarting the phone is the first choice. The general operation method is to press and hold the power button for a few seconds, or you can pull out the battery and forcibly shut down and restart it.

2. Restore the factory settings. Restoring the factory settings will lose the address book and SMS, so you should back it up before using this function.

Brush machine Brush machine is risky, study it clearly before operation, or find an official maintenance point for maintenance. Back up the data before brushing the computer.

Don't delete files you think are unnecessary. Some crashes are caused by users mistakenly deleting system files.

Smart phones have a lot of storage space, but when using them, try to store a lot of short messages and large-size pictures in memory or memory cards, and don't take up too much body memory.