10-30-2018 07:49 AM - edited 10-30-2018 07:56 AM
Hi, I recently bought a Lenovo TB-7304F to use in my car as an infotainment display, but I would like to root it to gain full control over any power related settings. I know this will probably void my warranty but I don't care that much.
The first hurdle was to get the bootloader unlocked, but this wasn't as easy as it seemed. Using ADB I can connect to the tablet and put it into fastboot mode. When in fastboot mode, the device answers to both the <fastboot devices> command and the <fastboot getvar all> command, returning the proper values. Most importantly (as far as I know), it returns these values:
(bootloader) off-mode-charge: 1 (bootloader) warranty: yes (bootloader) unlocked: no (bootloader) secure: yes (bootloader) kernel: lk (bootloader) product: HQ8167_TB_N (bootloader) version-preloader: 0.1.00 (bootloader) version: 0.5
However, whenever I want to use any form of unlocking the bootloader (<fastboot oem unlock> or <fastboot flashing unlock>) the command prompt returns the lines:
FAILED (remote: 'unknown command') Finished. Total time: 0.00Xs
Is there any way to unlock the bootloader so I can finally get to work on rooting this device?
EDIT: Forgot to mention that "OEM Unlocking" in the developer settings is turned on
11-08-2018 12:59 AM
Hi, i want to use this tablet for the same reason......standard command found online doesn't work (fastboot oem unlock,fastboot oem unlock-go,fastboot flashing unlock).It seems that no oem command are not recognized. Also I try different adb driver or fastboot exe (Minimal ADB and Fastboot,platform-tools) with no success. No help from Lenovo Support and i don't think security code is needed for bootloader unlock.A strange thing is that the only adb driver working for me is Alcatel ADB driver....
01-24-2019 10:00 AM
Go to Settings and then About Tablet. Click 7 times Build Number, till No need you are a developer popup comes. Come back and go to Developer Options. Enable it, enable Usb debugging and OEM Unlocking. Then do the steps tgat you did to root the tab.