Go to Settings > About phone to verify the firmware version installed. Your Android One device is now running the latest Android 5.1 Lollipop update via stock ROM.

Once restore process is complete, just reboot the device into the freshly installed Lollipop OS.

Return to the main recovery menu and run advanced restore function to restore only /system and /boot.

This will help in preventing boot loop issues or any boot ROM related errors during firmware installation.

Most of the high-end phones going to have this. Now Google has launched its new Android 6.0.1 Marshmallow. Most of the ROMS come only with the ROM files so we have to flash Gapps.Zip files separately. It is a good idea to place it on the root of the storage card. Copy the downloaded ROM to the storage card. Connect your phone to your computer via USB and mount its storage card. To do this, go to the 'advanced' option and then click Wipe Dalvik Cache. Gapps Packs are needed on Android to run any Google apps like Gmail, Google+ and other Google applications. Download the ROM from the link given in the article featuring that ROM.

In Recovery Mode, perform Wipe Cache Partition and wait until the process completes.

Boot the device into Philz Advanced Touch Recovery or Recovery Mode, using the designated hardware keys on your phone.

Power off the phone and disconnect its USB cable from the computer.

Copy the downloaded Android 5.1 stock ROM zip file to the root folder on the phone's SD card.

Connect and mount the phone's USB mass storage on the computer via USB cable.

Download the Android 5.1 Lollipop OTA zip file to your computer.

Steps to install Android 5.1 Lollipop stock ROM on Android One Devices Philz Advanced Touch Recovery with one click installer (v 6.57.9)

This is stock Android 5.1 Lollipop build released by Google and not a leaked firmware.

Hence, verify the model number of the device before installing the OTA update. Installing the firmware on any other variant could brick the device.

The Android 5.1 Lollipop OTA update is only for Android One smartphones.

NikGapps, on the other hand, comes in various packages. BiTGApps comes as flashable zip files of packages as well as Google Installer APK. Here are Gapps packages for Android 11 ROMS from various developers.

The bootloader of the device should be unlocked. Download Android 11 Gapps For ARM / ARM 64 Devices.

Ensure that your phone has above 80% battery charge.

Back up important data and settings on your device via recovery mode.

Users are advised to proceed at their own risk. IBTimes UK reminds readers that it will not be held liable for any damage to device, during or after the firmware installation. Interested Android One users, who missed the OTA notification on their device or cannot wait for the official Android 5.1 release in their country or region can go ahead and install the same manually, using the step-by-step guide provided below. How to install Android 5.1 Lollipop stock ROM on Android One smartphones XDA

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