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Amazfit Stratos
This is a custom ROM for the Huami AmazFit Smartwatch 2 (A1609) and the (to be announced) international Xiaomi AmazFit STRATOS (A1619).
adb shell reboot bootloader fastboot devices fastboot getvar all fastboot oem unlock xxxxx fastboot reboot
push firmware
adb push update.zip /sdcard/ adb push recovery.img /sdcard/ adb push start_update.sh /sdcard/ adb push md5s.txt /sdcard/ adb root adb shell cd /sdcard/; sh start_update.sh