Uninstalling unnecessary software can be done in mobile phone settings and program management. Or use the program management function of security software (such as mobile phone housekeeper) to uninstall. For pre-installed software and system software, you need ROOT permission to uninstall normally. After getting ROOT permission, use security software, turn on the system slimming function, and delete it. The pre-installed software can be uninstalled normally. After uninstalling the system-level software, it may lead to boot failure or some functional problems. Do not uninstall unknown system software and unrecognized software.