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Hey all, following up on this thread. Current state after following the recovery path from this thread and the BooxPalma2RootGuide issue #9:
FP4 ABL flashed to abl_a/abl_b via EDL: fastboot commands work
frp_oemunlock flashed + devinfo wiped: bootloader shows Device unlocked: true
Stock recovery flashed to recovery_a/recovery_b
misc-recovery.img flashed to misc
Device boots into recovery: shows as 18d1:d001 "Go7" (ADB sideload mode) in USB
The problem: adb sideload update.zip fails with "device unauthorized." The e-ink screen is completely blank so I can't approve the USB debugging dialog. Set ADB_VENDOR_KEYS to my local key: still unauthorized.
I think I need the custom go7-rec.img that jd27 referenced in post #25?
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