How to Root Lenovo TAB3 8

The Lenovo TAB3 8 is a budget-range Android tablet, featuring an 8.3 x 4.0 x 0.4 screen, and a display resolution of 1280×720 pixels. Rooting this device is a fairly simple process, as we just need to push TWRP recovery through ADB, and flash SuperSU from inside TWRP.

Warning: Unlocking the bootloader will initiate a factory reset. Transfer all of your personal data to your computer before continuing with this guide.

Requirements:

• Minimal ADB & Fastboot v1.4 Windows Installer
• Official Lenovo USB Device Driver v1.1.21
• TWRP v3.0.1 for the TB3-850F
• ADB Driver Installer for Windows
• SuperSU v2.79-SR3 flashable zip

All necessary files can be obtained HERE

1. The first step is to unlock the bootloader of the Lenovo TAB3 device. Go into Settings > About Device > tap ‘Build Number’ 7 times until Developer Mode options are confirmed as unlocked.
2. Now go into the Developer Options and enable ‘OEM Unlocking’ and ‘USB Debugging’.
3. Install the Minimal ADB and Fastboot drivers on your PC – see “How to Install ADB on Windows” for a guide.
4. Connect your Lenovo TAB3 to your PC via USB, go into the main ADB/Fastboot folder directory, hold SHIFT+Right click and choose “Open command window here”.
5. In the ADB terminal, type: adb devices
   
   
6. ADB should display your device’s serial number – if not, you may need to try reinstalling the ADB drivers, or troubleshooting beyond the scope of this guide. If your serial was displayed, you’re good to continue.
7. Now type into the ADB terminal: adb reboot bootloader
8. Your Lenovo TAB3 will now boot into Fastboot Mode. Once you’re there, type into the ADB terminal: fastboot oem unlock
   
   
9. Your device will prompt you to press ‘Volume Up’ to proceed with the bootloader unlocking, so go ahead and do it if you’re ready.
10. Because unlocking the bootloader performed a factory reset, we need to re-do the steps in the beginning of this guide for unlocking the developer options, and enabling OEM Unlocking and USB Debugging.
11. We are now ready to flash TWRP. So transfer the TWRP .img file to the ADB/Fastboot path/directory on your PC, and you should also save a copy onto your device’s internal storage or SD card.
12. Open a new ADB command terminal, and type: fastboot boot twrp.img
    
    
13. Your device should now reboot into the main TWRP recovery menu. Choose Install > select the TWRP.img file you stored on your device, and swipe to begin the installation.
14. After TWRP is successfully installed permanently on your Lenovo TAB3, do not allow it to make changes to /system. You want to go to Reboot > System, and allow your Lenovo TAB3 to completely boot into the Android system.
15. When it’s done rebooting into the Android system, transfer the SuperSU .zip to your SD card, open a new ADB command terminal, and type: adb reboot recovery
16. It will reboot back into TWRP main menu, so this time go to Install > choose the SuperSU.zip on your device, and swipe to install it.
17. SuperSU will install itself as a systemless root mode, meaning no changes will be made to the /system partition, except modifying the stock boot image. When SuperSU is done flashing, do a Reboot > System through TWRP.
18. The first time rebooting your phone after flashing root may take up to 15 minutes, so just leave your device alone until it is fully booted into the Android system. Congratulations, you’re now rooted!

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