How to Install Android 5.1 Lollipop on your Nexus device Manuallyby Abhishek P March 16, 2015
Google recently rolled out the most anticipated Android 5.1 update for major Nexus devices – Nexus 5, Nexus 7 and Nexus 10. These are the first ones to receive the update. The Android 5.1 factory images for the 3 devices have been posted on the website. In case you can’t wait until the update reaches your device, you can install the latest Android 5.1 using one of these images based on the Nexus device on your own.
But, it would be wise not to fiddle around with your device if you are not quite tech savvy. Take up the task only if you know how to handle the situation if something goes wrong. Updating your device to the latest Android version will erase all your existing data. So, before you get started, make sure to backup all your data.
Here We Go….
Installing ADB on Microsoft Windows, Mac, Ubuntu and Chrome OS
Before getting started with the Android 5.1 installation, you need to install the ADB (Android Debug Bridge). This program runs on your computer, connects to your Android devices trough a USB cable and flashes the latest Android version onto it.
This step may seem a bit annoying, but hey, don’t you worry. We’ll try to keep it simple.
Download the ADB installer for Windows. Right click on the downloaded fine and run it as an administrator. Once the app is launched type ‘Y’ and enter. This will start the ADB installation process. A new window will then pop up. Simply follow the steps to install the drivers.
Once the ADB is installed, you are now ready to install the android update onto your Nexus device.
Installing ADB on Mac, Linux and ChromeOS
Start by opening the Terminal on your computer. Copy and paste the below code to the terminal and run it to install ADB and Fastboot on your system.
bash <(curl https://raw.githubusercontent.com/corbindavenport/nexus-tools/master/install.sh)
Once the script is completed, you can then type ADB or Fastboot and this will run the respective programs. This is when you need to flash the latest Android image on your device. However, before you do that go to settings > Developer Options > Enable USB Debugging.
Installing Android 5.1
We now come to the best part. Download the Android 5.1 System Image for the device you own. Below are the links to the images.
Google hasn’t yet uploaded the system image for Nexus 4. However, you can surely expect it to arrive in a few days. Note that the installation process remains the same.
Unzip the downloaded files. Now open command prompt on Windows. If you own a mac, open the terminal. Navigate to the adb folder, type the command mentioned below and hit enter.
adb reboot bootloader
Now, move to the Fastboot folder and type:
Fastboot oem unlock
Hit enter and follow the instructions displayed on the screen. The process will delete everything from your device.
Flashing the Image
Open the command prompt window and type the below commands to install Android 5.1 update to your Nexus device.
Mac users need to use the following command.
This installs all the necessary files onto your nexus device. Your device may reboot with just a logo being displayed on the screen for a long time. Do not unplug the device while the process is on. It might take more than 10 minutes, so be patient.
There you go. Android 5.1 is now installed. Spend some time exploring the OS. You are sure to love it.