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Posted at 4/20/2015 16:35:58
1#
Last edited by busybee In 4/20/2015 17:22 Editor
I'm afraid there are no keys or buttons map to volume up/down currently. There's hardly a need to enter the interactive recovery mode.
You should plug out the SD card before using USB upgrade. The SD card with upgrade firmware has impact on the upgrade process.
What SD card image would you like to generate, one to upgrade the firmware on the eMMC, or one that can directly boot into system?
Please refer to this post:
https://plus.google.com/+IanMORRISON/posts/22Vxc6Sr5Ei
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