Android 5.1 LMY47D Lollipop OTA hits Nexus 5, Nexus 6, Nexus 7 and Nexus 10: How to install

Google has just started rolling out its latest Android 5.1 Lollipop over-the-air (OTA) update with build LMY47D for Nexus 5, Nexus 6, Nexus 7 and Nexus 10, following its recent release of factory images for a few of these devices.

As the Lollipop update is being rolled out in a weekly phased manner, the OTA notification may not yet be accessible to some users, depending upon the country or region where they are located.

Such users who missed the OTA notification or cannot access the update via Google's servers for some reason can install the same manually, using the step-by-step guide provided below.

Android 5.1 Lollipop OTA Download Links

Nexus 4: Links to be available shortly

Nexus 5: hammerhead LMY47D from LRX21O

Nexus 5: hammerhead LMY47D from LRX22C

Nexus 6: shamu LMY47D from LRX22C

Nexus 7 2013 Wi-Fi: Links to be available shortly

Nexus 7 2013 LTE: Links to be available shortly

Nexus 7 2012 Wi-Fi: nakasi LMY47D from LRX22C

Nexus 7 2012 3G: Links to be available shortly

Nexus 9: Links to be available shortly

Nexus 10: mantaray LMY47D from LRX22C

Pre-requisites

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 said Nexus devices. 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 LMY47D released by Google, not leaked firmware.
Your Nexus device should be running Android 5.0 LRX21O or LRX22C Lollipop stock firmware.

How to install Android 5.1 Lollipop via adb sideload on 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 OEMunlock 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 devices

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

Step 5: Boot your Nexus phone into bootloader mode or recovery mode by entering the following command: adb reboot bootloader

Or hold Power and Volume Down buttons together while your Nexus phone is turned off.

Step 6: Now press the Volume Down buttons 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 7: 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 8: 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 9: Once the update is completed on your Nexus device, it will restart automatically and boot to normal mode

Your Nexus device should now be running the latest Android 5.1 LMY47D stock firmware.

[Source: Android Police]