In order to help the users of Ultra to know how to flash this phone, Our technology engineer has demonstrated the whole flash process for you in this tutorial video. Hope it can do some help to you.


Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data. 


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