Android 7.1.2- Download Zip File [updated] -
If you have a Samsung, LG, Motorola, or other device that no longer supports 7.1.2 officially, you need a Custom ROM.
Once you have the correct zip file, the general process involves: Unlocking the Bootloader (which wipes the device). Installing a Custom Recovery (like TWRP). Transferring the Zip to your phone's internal storage. Booting into Recovery and selecting "Install" to locate and flash the zip file. download link for a particular phone model or instructions on how to the file once you have it? Android 7.1.2- Download Zip File