Restore factory settings
Restoring factory settings is a good choice. Sometimes the phone gets stuck because the installed software takes up a lot of running memory. Nowadays, many mobile phones have achieved 2G of running memory, and 256MB is really not enough.
root
If the problem is still not solved after the factory settings are restored, then we can try to "slim down" the mobile phone -root, remove some unnecessary system software, and continue to reduce the burden of running memory.
Storage plug-in
If your mobile phone memory card is poor, it may also affect the running speed. A genuine Kingston or Sandisk tf card above c4 may solve the problem.
Change planes
If none of the above methods work, then maybe this phone is really not very powerful. Consider changing it.