Slimming your mobile phone.
Open "Intelligent Manager" (that is, Memory Manager), click "Storage Space/Memory", and delete all unnecessary data and applications!
Turn off applications that steal traffic.
Touch the "Recent Tasks" button in the lower left corner of the screen, and then click the "X" in the upper right corner of the application to be closed or "Close All" below to turn off those guys who steal traffic!
Find a new home for multimedia
Move large files such as photos and videos to an expansion card, or set the shooting storage path as an expansion card. Haven't bought a memory card yet? Move the multimedia files to the computer quickly!
Cleaning time
Uninstall the software and files you hardly use to make more room for your mobile phone.
Restore factory settings
If all the above methods fail, back up your important data (contacts, information, photos, etc. ), and then restore the factory settings to make your mobile phone look brand-new!