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When the phone is turned on, press and hold the power button of the phone, and select "turn off" to turn it off.
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Press and hold the power button to start the machine, then press and hold the volume+button, and then press and hold the power button for a long time until the recovery interface appears.
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Wait a moment before you can enter the recovery, and release the button to operate. In this mode, the volume+,-stands for up and down operation, and the power key is OK.
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The following are some English notes under the recovery page:
-Restart the system immediately to restart the system.
-apply sdcard:update.zip Update the system with update.zip in the root directory of SD card.
-Erase data/restore factory settings Erase data partition and restore factory settings.
-wipe cache partition clears the cache partition
-install zip from sdcard and select file update system from SDcard.
-apply sdcard:update.zip Update the system with update.zip in the root directory of SD card.
-select zip from sdcard to select zip format upgrade package from SD card.
-Toggle signature verification to toggle signature verification
-Switch Scripts Asset Switch Upgrade Scripts Check
-Backup and recovery Backup and recovery
-Backup. Backup
-Restore and restore