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After the device is updated, it is rebooted again. After the device starts
properly, it is recommended to manually restore the device to its original
factory default settings by selecting Settings > Backup & reset > Factory
data reset to enhance the system stability. The device is upgraded
properly and can be used.
B. Forced upgrade (for the device that cannot be started or the device that
cannot enter standby state)
1) For a powered-off device, press and hold both the volume up key and
power key until the device shakes once. The device enters Recovery mode.
In this mode, the volume keys can be used to select a menu, and the power
key can be used to confirm it, see Figure 1.
2) Press the volume down key to select apply update form sdcard, and
press the power key to confirm it. The root directory of the SD card is
All rights reserved. No spreading without permission of ZTE.
Figure 2-6
Figure 1
Secret▲
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