The official Android 5.1.1 Lollipop Factory Image is now live for the Google Nexus 7 2012 tablets. Use this post if you want to learn how to successfully install this new brand new factory image on your device.

A factory image can be used with multiple purposes: as an updating tool to a newer Android firmware, as a 'factory resetting' tool, or as a OS refresh action. Normally installing a factory image wipes clean the entire data that's stored on your smartphone and you will end up being forced to re-install all your favorite apps.

In case you need to factory reset your tablet, then you are in the right place as this tutorial can be used to wipe clean your device.

If you want to use this tutorial as an updating tool to Android 5.1.1, then you will have to read the small workaround listed in the 'how-to' part. The workaround allows you to edit the 'flash-all.bat' script and remove a couple of characters in order to prevent 'factory reset' from being triggered.

Read the guidelines below before starting the installation process:

  • this guide works exclusively with the Wi-Fi variant of the Google Nexus 7 2012 tablet edition.
  • don't update any other devices with the files that you will find in this post, as it won't work and you might end up bricking your device.
  • installing the factory image removes all data from your device.
  • if you are running Android 5.1 on your device, and you wish to update the tablet using this post, then you can use a small workaround.
    - all the info about the workaround is listed in the tutorial.
  • Android 5.1.1 factory image is a full copy of the OS that's already installed on your device.
  • in case you tablet is rooted, then you will lose root access.
  • you should back up all your important data before starting installation.
  • enable USB Debugging from Developer Options menu.
  • you can't blame us in case you lose data nor in case you end up bricking your smartphone.
  • read the whole guide and do not skip any steps.
  • make sure that the battery charge level is over 50%, that will prevent the device from powering down during installation and first boot processes.

Here's how to avoid the 'factory reset' in case you are running a Stock Android OS and you wish to only update your device without factory resetting it:

  • after the download of the Android 5.1.1 LMY47V is completed you will extract its contents.
  • find the 'flash-all.bat' script and open it in a file editing tool.
  • find the "-w" characters and delete them.
    - that's the action that tell the factory image to factory reset your device.
  • save these changes and that should be all.

You can continue to the tutorial part of this post.

In case you are running a custom ROM on your tablet, then you can't skip the 'factory reset' and you will have to apply it successfully.

How to flash Android 5.1.1 LMY47V Lollipop for 2012 Nexus 7 Wi-Fi Edition:

First you will have to setup the Android SDK 'platform-tools' folder.

Here's how to setup Android SDK:

  • get the Android SDK from here.
  • extract its contents and save all files on your computer.
  • launch SDK Manager and install all drivers and SDK packages.
    - you will have to locate the 'platform-tools' folder.
    - that's where you will need to place the download / extracted files.
  • install the Google USB Drivers for your computer now.

That's it, now you can learn how to flash the new firmware for your tablet.

How to flash Android 5.1.1 Factory Image for 2012 Nexus 7 Wi-Fi:

  1. Download Android 5.1.1 LMY47V factory image zip from here.
  2. Extract the contents and save them on your computer now.
    - place all the extracted files in the 'platform-tools' folder.
    - this folder is stored in the SDK directory you've created using the info above the tutorial.
  3. Switch off your tablet.
  4. Boot it in Fastboot Mode.
  5. Open a command prompt window in the folder where you've placed the files extracted in step 2.
    - it can be opened by pressing and holding SHIFT key, then right-clicking on the empty space to select 'open command window here'.
  6. Connect your 2012 Nexus 7 Wi-Fi to your computer via USB Cable.
    - use the 'adb devices' command in order to verify that your device has been detected by your PC.
    - if the device hasn't been detected, then you will have to re-install the USB Drivers.
  7. Start Android 5.1.1 Factory image installation:
    - double click on the 'flash-all.bat' script to start.
  8. Confirm the process.
    - don't press any buttons until the installation of this new factory image is complete.
  9. Reboot the tablet in normal mode after Android 5.1.1 factory image completes its installation.

Use your default login info in order to regain complete control over your smartphone once again.

Note that the first boot process of this new Android 5.1.1 ROM will take a while before it loads all the new files. In case you cannot complete installation, then you should use the comments field below.

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