Most custom ROMs for the Lumia 520 come as a .ffu (Windows Flash Update) file or a .img for DD.
With the bootloader unlocked, you can use WPInternals to enable "Root Access" on the phone's current firmware, allowing you to read and write directly to the protected system partitions. Step 4: Flashing the Custom Image nokia lumia 520 custom rom work
. While officially limited to Windows Phone 8.1, community efforts have expanded its capabilities to include Android and Windows 10 Mobile. Most custom ROMs for the Lumia 520 come as a
Once unlocked, use WPI to boot the phone into . This turns your Lumia 520 into a glorified USB flash drive, allowing your PC to see the phone's internal partitions (EFIESP, MainOS, Data). Step 3: Flashing the Custom ROM nokia lumia 520 custom rom work