LG Nexus 4 users are in for some exciting news, as Google has finally rolled out the most-anticipated Android 5.1 Lollipop over-the-air (OTA) update, which bumps the build number from LRX22C to LMY47D on the popular smartphone.

The new Android 5.1 update brings numerous bug-fixes and feature enhancements over the earlier Lollipop builds in a significantly large file size of 174MB.

Restless users who cannot wait for the phased official OTA rollout in their country and those who missed the OTA update notification on their phone for some reason may go ahead and install the same manually, using the manual OTA download link and step-by-step guide provided below.

Downloads Required

Android 5.1 Lollipop OTA for Nexus 4 (mako)


  • Back up important data and settings on your device via recovery mode.
  • Ensure that your Nexus phone has above 80% battery charge.
  • The bootloader of the device should be unlocked.
  • The Android 5.1 OTA update is only for Nexus 4. Installing the firmware on any incorrect variant could brick the device. Therefore verify the model number of the device before installing OTA update.
  • This is stock Android 5.1 build LMY47O released by Google, not leaked firmware.

How to install Android 5.1 OTA update on your Nexus devices

Step-1: Download Android SDK from the Android Development site and follow the instructions on how to install it correctly. For the following process you need the adb and fastboot files which are located in the Paltform-Tools folder

Step-2: Enable developer settings and USB debugging.

  • Navigate to Settings then About phone
  • Tap on build number seven times until a dialogue box appears saying you are now a developer
  • Return to Settings menu and you should find a new option called Developer options, click on it
  • Ensure that the Developer options are turned on and the USB debugging is checked
  • Ensure that Enable OEM unlock is checked, if you are upgrading your Nexus device that has Android Lollipop already installed
  • Connect your Nexus device to the computer and click OK on the dialogue box that asks you to Allow USB debugging, while connecting to the computer.

Step-3: Place the OTA file in the Platform-Tools directory in order to simplify the process of sending the files to your Nexus phone

Step-4: Ensure that your Nexus phone is connected to the computer with the device's serial number showing up as a connected device. Then execute the following command

  • ./adb device

You should see the serial number followed by the name of the device

Step-5: Boot your Nexus phone into bootloader mode by entering the following command or, holding Power and Volume Down buttons together while your Nexus phone is turned off

  • ./adb reboot bootloader

Now press the Volume Down button twice until you have scrolled to Recovery mode. Now press the Power button to select it. This will look like your Nexus device is restarting but an image of an Android with red exclamation mark over it will appear. Now hold the Power button and press the Volume Up button and your device will be in recovery mode

Step-6: When your Nexus device is in Android system recovery, use the Volume Down button to highlight apply update from ADB and hit the Power button to select it. Now enter the following command

  • ./adb sideload [OTA file].zip

Step-7: The terminal or command prompt will now show a dialogue with the progress of transferring the update to your Nexus phone. Once the update is transferred, you can see the progress bar on the screen.

Step-8: Once the update is completed on your nexus device, it will restart automatically and boot to normal mode

Your Nexus 4 should now be running the latest Android 5.1 LMY47O stock firmware.

[Source: Android Police]