TCLa990 smart phone, the response is getting slower and slower.

There is basically no virus, mainly because there are too many software installed in the mobile phone, too many programs running automatically in the background (unnecessary, some run automatically), and the storage space of the mobile phone is too large (RAM is equivalent to the memory of the computer).

Your mobile phone itself has 5 12M RAM, which is normal. Which background software of the current software should not occupy 10M? Why can't a mobile phone like you have 4 or 5 background softwares?

Plus the original 350M system, how much space do you think you can run?

Delete a few software that is not commonly used, or brush the machine to simplify the useless system. Brush for a simpler system, but it is also possible that the compatibility between systems is poor and the brush is not as good as before.

Therefore, the existing system should be backed up before the computer is refreshed. If not, it can be restored.