This Unofficial Cyanogenmod Custom ROM of Android Marshmallow For Nokia XL can be used to update your device. Follow this comprehensive step-by-step guide on how to install Custom ROM to your device easily and safely. However, before you start flashing, you need to know that this guide only work for Nokia XL so do not to try this method on any other Android device. Any damage occurs during the process is at your own risk though it is very unlikely that your device will be damaged if you follow this guide carefully. You also need unlock / root your device in order to apply this update. For safety measure, you can create image of your system by installing Nandroid tool. This allows you to restore your device back to the previous state when something bad happens.
How To Update Device
Before beginning Android Marshmallow For Nokia XL, you need to unlock or root your device and this step has the risk that it will void your device’s warranty. But, you can follow the steps to unroot your device and reinstall the official firmware back. First, you just need to unlock bootloader of your device and flash a custom recovery though this process likely to require you to root your device. Done with unlocking bootloader, turn off your device and start recovery mode by pressing the power and volume keys simultaneously. In the recovery mode, choose Backup option or Nandroid. You may leave any setting here and keep the default settings. Start your backup process and wait for the backup to complete. You may also want to use Titanium Backup to root device and back up your apps and settings.
Now download Unofficial Cyanogenmod ROM zip file of Android Marshmallow For Nokia XL and Gapps File into the SD card. You may need Wi-Fi connection as the file is huge. Now turn off the device and enter into Recovery mode. From the menu, choose Install ZIP from SD Card option and browse the ZIP file you have downloaded before. Sit back and relax as the process might take a couple of minutes to complete. Once done, run TWRP tool and choose Wipe option to erase all data or Factory Reset including Wipe Cache Partition option. Repeat the above steps to install the Gapps file. This file allows you install Google apps such as Gmail, Google Play Store and such. Now reboot your device and wait for it to reach the opening screen. Now you have successfully installed the custom ROM of Android Marshmallow For Nokia XL.