Usually, Tencent mobile phone housekeeper should be used to clean up the memory of mobile phones and clean up viruses. Open Tencent Mobile Manager. When you open it, you will see an option of "cleaning acceleration". After clicking the garbage cleaning icon, the software will automatically clean the garbage files cached on the mobile phone. Let the mobile phone realize more powerful space release, thus effectively improving memory utilization. If the above method still doesn't work, suggestions: backup the data of mobile phone, reset the mobile phone and restore the factory settings, which is quite effective and thorough!