The official Android 5.1 LMY47D Lollipop OTA Update is now live for the 2012 Nexus 7 Wi-Fi tablet. Use this post if you want to learn how to successfully install this brand new firmware update files on your device without bricking it.

This new software update comes with several tweaks and UI improvements that should make your tablet device run faster than it did up until now. Check the guidelines below before starting the installation process of this new official firmware:

  • use this post only with the 2012 Nexus 7 Wi-Fi tablet.
  • the tablet needs to running stock Android 5.0.2 Lollipop LRX22G firmware.
    - if your tablet runs a previous official firmware, then the installation doesn't work and you should check the LRX22G Android 5.0.2 Update tutorial here in order to upgrade to that firmware first.
  • don't try to install the files that you will find in this post on any other Android devices.
  • this new updating process works only for stock Nexus 7 tablets, if you're running a custom ROM on your device and you still want to flash an official Android 5.1 build, then you can use the 'factory image' installation guide here.
  • this is a guide that has to be used only by advanced Android users, we cannot be held responsible in case you end up losing any data files in the process.
  • we can't be blamed in case you brick the tablet.
  • enable the USB Debugging option from the Developer Options menu.
    - the Developer Options section might be hidden, so you will have to enable it first by going to Settings> About Device and tapping 7 times on the 'Build Number' text.
  • check the battery charge level of your device and make sure that it is over 50%, it prevents the tablet from powering down during the installation process.
  • in case you can't complete the update, then you should ask for more help in comments.

If you've modified the tablet's ROM in any way, then you can still update it to Android 5.1 firmware by using the Android 5.1 Factory Image installation guide for Nexus 7 2012 Wi-Fi here.

How to install Android 5.1 LMY47D Lollipop for 2012 Nexus 7 Wi-Fi tablet with ADB Sideload:

First you will need to setup the Android SDK Studio:

  • download the Android SDK bundle from here.
  • extract all the contents of the zip file and save them in a folder named SDK.
    - you should place the folder on your desktop or somewhere you can find it easily.
  • open SDK folder and launch the SDK Manager executable.
  • confirm the installation of all SDK packages and drivers for your PC.
  • download and install the Google USB Drivers too.
    - if you don't have the Google USB Drivers installed you won't be able to connect the tablet to PC.

Now you can continue to the Android 5.1 Update installation files:

  1. Download the Android 5.1 LMY47D OTA Update zip from here.
  2. When the download is completed successfully you have to rename the file to "update.zip".
    - renaming the file name to a shorter title will allow you to work easily from the command prompt and fasten the updating process.
  3. Switch off your Nexus 7 2012 tablet.
  4. Now boot it in Recovery Mode.
  5. Move the 'update.zip' file to "platform-tools" folder in the SDK directory you've created using the instructions above the tutorial.
  6. Go to "platform-tools" folder launch a Windows command prompt there.
    - Windows CMD can be launched in a specific folder like this: press and hold SHIFT, then right-click on the folder's white space and select "open command window here" from the context menu.
  7. After the Windows CMD is opened you should enter adb devices
    - this will tell you if the tablet has been recognized by your PC.
    - if the Nexus 7 hasn't been detected, then you will need to re-install the Samsung USB Drivers.
    - if the device has been recognized you can continue to the next step.
  8. Select the 'apply update from adb' option from the Recovery Mode menu.
  9. Now, go back to Windows CMD and enter the following command in order to start the update: adb sideload update.zip
  10. Confirm the installation and wait until all files are installed with success.
  11. Reboot the tablet in normal mode after all the files have been successfully installed.

NOTE: the first boot process of this new Android 5.1 firmware will take more than 10 minutes, so you should wait until the welcome screen appears before pressing any buttons.

If the first boot of your 2012 Nexus 7 device takes more than 30 minutes and it doesn't go past the boot animation or the device enters into a boot loop, then you should repeat the whole guide more than once as the update has failed. Make sure not to skip any steps and that your tablet meets all the requirements before retrying the installation process.

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