These are applications deployed to the phone to edit the registry, change device identification codes, and enable interop-unlock capabilities. Step-by-Step Overview of the Modification Process
While the Lumia 520 was never officially supported for Windows 10 Mobile, the enthusiast community developed several workarounds. 1. Android (Android4Lumia Project)
On Windows Phone, a custom ROM typically means:
Bringing a Legend Back to Life: The Nokia Lumia 520 Custom ROM Guide Installing a custom ROM on the Nokia Lumia 520
A custom ROM is a replacement for your phone's stock operating system, built by independent developers. Here’s why the Nokia Lumia 520 is a popular device for this kind of project: