Safety brush machine
Xiaomi mobile phone has a lock-free independent dual system, so you can brush the machine with confidence. Double system data * * * enjoy, in the case of a system paralysis, ensure access to another system, ensure data security!
System mutual cutting
Enter the recovery: in the power-off state, press and hold the "Volume Increase Key" first, then press and hold the "Power-off Key", and then let go to enter the recovery after the boot screen appears. If you can enter the recovery, please select Restart under Recovery to see the two systems.
Backup data
Dual system actually means backup system, which is designed for safety, not for dual system. To prevent one of the partitions from being damaged, it may be restored without brushing, which is not the dual system you understand.
Deleting is not recommended.
At present, Xiaomi has no official way to delete one of the systems, and it is not recommended that you do so, which will affect the stability and normal use of the system.
Hardware upgrade
Sometimes the system version cannot be downgraded because of the firmware upgrade of the hardware module, but this situation is very rare.