Update Android 5.1 Lollipop Official Factory Images on Nexus 4, Nexus 7 Manually [Install Guide]

Owners of Nexus 4 and Nexus 7 devices have been waiting for the Android 5.1 Lollipop update on their devices for over a month and the wait is finally over.

Shortly after reports of official OTA update of Android 5.1 Lollipop for Nexus 4 appeared online, Google published factory images of the software for its 2012 handsets, Nexus 4 and Nexus 7. As a result, users who are eager to get their hands on the latest software can finally download and install Android 5.1 on their devices.

Before manually updating the Nexus devices with the latest software, it is important to know how to prepare the device to avoid any errors. Firstly, users need to back up their data on the handsets as installing factory image will wipe the phone clean. Ensure ADB and Fastbook is set up correctly and the PC has all necessary drivers needed to detect the smartphone. Also, bootloader must be unlocked in order to flash the factory image.

Once your device is ready for the manual update, follow these steps to make sure the software is installed correctly, (via Google). The build number for Android 5.1 is LMY470.

[Disclaimer: IBTimes India does not claim any responsibility of any damage caused to your device during the process. Readers must proceed with caution and at their own risks.]

How to install Android 5.1 Lollipop factory image on Nexus 4 and Nexus 6 Manually [STEPS]

1. Download Android 5.1 Lollipop Official Factory image on your computer. (Nexus 4 owners Click Here, Nexus 7 2013 Wi-Fi owners Click Here and Nexus 7 2013 Click Here)
2. Unzip files to a known location
3. Connect the Nexus device to your computer
4. Restart the phone into Fastbook or Bootloader mode by holding down Volume Up + Volume Down + Power buttons simultaneously.
5. Find the downloaded files on the computer then extract them and copy on your Fastboot directory.
6. Flash the factory image in your Fastbook directory using these commands

- On Windows: Run the file "flash-all.bat".

- On Mac: Run the file "flash-all.sh" using Terminal.

- On Linux: Run the file "flash-all.sh".

After running the commands, the files will be pushed to the target device. Wait until the Nexus handset reboots and do not unplug the device at any time during this process. Once the set-up is complete, there will be on-screen prompts. Unplug the device once the installation is complete.

The Nexus handset will be as good as new in terms of software. Set up the device like you would on a brand new phone by entering all the necessary information. To ensure the update was installed correctly, go to Settings > About Phone and check if the Android version shows 5.1.