Fastboot mode usually comes up if your LG G Watch R went wrong when trying to flash a recovery image, for example when flashing TWRP recovery or ClockWorkMod.
How to enter into fastboot mode:
- Turn off the G Watch R
- Turn the watch on normally
- While LG logo is displayed and before the screen dims, swipe your finger from the top-left (10:30) position to the bottom-right (4:30) position.
Now you can easy enter the Recovery Menu of your G Watch R.
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