Google has finally broken their silence about the rollout of Android 5.1, finally making an official announcement. Things are starting to move quickly: the company has wasted no time in publishing the first set of Android 5.1 factory images to their repository for Nexus Devices:
- Android 5.1 for Nexus 5 (download link | forum)
- Android 5.1 for Nexus 7 Wi-Fi 2012 (download link | forum)
- Android 5.1 for Nexus 10 (download link | forum)
To flash a system image:
- Download the appropriate system image for your device below, then unzip it to a safe directory.
- Connect your device to your computer over USB.
- Start the device in fastboot mode with one of the following methods:
- Using the adb tool: With the device powered on, execute:adb reboot bootloader
- Using a key combo: Turn the device off, then turn it on and immediately hold down the relevantkey combination for your device. For example, to put a Nexus 5 (“hammerhead”) into fastboot mode, press and hold Volume Up + Volume Down + Power as the device begins booting up.
- If necessary, unlock the device’s bootloader by running:fastboot oem unlock
The target device will show you a confirmation screen. (This erases all data on the target device.)
- Open a terminal and navigate to the unzipped system image directory.
- Execute the
flash-allscript. This script installs the necessary bootloader, baseband firmware(s), and operating system.
Once the script finishes, your device reboots. You should now lock the bootloader for security:
- Start the device in fastboot mode again, as described above.
- Execute:fastboot oem lock
Locking bootloader will wipe the data on some devices. After locking the bootloader, if you want to flash the device again, you must run
fastboot oem unlockagain, which will wipe the data.
Flashing a factory image will erase EVERYTHING on your device and if you don’t follow the steps properly, you risk damaging your device permanently. We won’t take any responsibility so proceed at your own risk and if you need help… we highly recommend visiting the appropriate section on Android Forums.
Google will inevitably push updates for additional Nexus devices over the course of time so stay tuned to Phandroid for that breaking news.