Update firmware on
Google Project Tango Tablet

Pre-Install Instructions

1. Download TowelRoot from here.
   • Click the large lambda symbol to download the .apk file.
   • Install and run the .apk file to achieve root access.
2. If you’re on Linux, proceed to step 3, if you’re on Windows, you’ll need to Install the NVidia APX drivers:
   info_outline

   Note: The APX driver is not signed by an authority recognized by Microsoft, so we will first need to temporarily disable driver signature enforcement. These instructions are for Windows 10, if you’re on any other version you’ll need to adapt these to your version.
   • Download the newest NVidia APX drivers here
   • Hold the “Shift” key on the host machine and click the Windows Start Button, then click “Restart”
   • If you’re on Windows 10, choose “Troubleshoot”, “Advanced options”, “Startup Settings”, then click “Restart”
   • Next, push the “7” key on your keyboard, your PC will now boot like normal
   • Extract apxdriver.zip, right clisk “NvidiaUsb.inf” and choose “Install” from the context menu. It may prompt you to authenticate with Administrator credentials, please do so now.
3. Download this firmware package.
4. Extract yellowstone_pie_psci.zip in your Downloads directory.
5. Now, prepare to run the flash script:
   • If you’re on Windows, open a PowerShell and run cd %HOMEPATH%\Downloads\yellowstone_pie_psci\yellowstone_pie_psci
   • If you’re on Linux, open a Terminal and run cd ~/Downloads/yellowstone_pie_psci
6. Run adb shell su -c dd if=/dev/block/platform/sdhci-tegra.3/by-name/PES of=/sdcard/persist.img
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   Note: This will take roughly one minute and will show no progress, please ensure the USB connection with the device is not disrupted.
7. Run adb shell su -c dd if=/dev/block/platform/sdhci-tegra.3/by-name/PEK of=/sdcard/persistbk.img
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   Note: This will take roughly one minute and will show no progress, please ensure the USB connection with the device is not disrupted.
8. Run adb pull /sdcard/persist.img.
9. Run adb pull /sdcard/persistbk.img.
10. Run adb reboot bootloader.
11. Use the volumte buttons to highlight “Forced Recovery”, and then click the power button to select it.
12. Now, run the flash script:
    • If you’re on Windows, right-click flash.bat, and in the context menu, choose “Run as Administrator”
    • If you’re on Linux, run ./flash.sh
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      Note: This process will take several minutes, go get a coffee, and ensure the USB connection with the device is not disrupted.
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      Note: The device will reboot to a mostly functional LineageOS 16.0, but to attain full functionallity, please proceed with the instructions.
13. Please follow the instructions found in step 2 here to re-enable ADB on the new installation before proceeding.