This process permanently alters the device. It is intended for advanced users. You can brick your phone (turn it into a paperweight) if you make a mistake.
To install a Custom ROM, you must bypass the secure boot. Nokia Lumia 520 Custom Rom
In this article, we'll explore the world of custom Roms for the Nokia Lumia 520, discussing the benefits, risks, and step-by-step guides on how to install and enjoy a customized version of Windows Phone on your device. Warning: This process permanently alters the device
The installation process involves:
This is the most headline-grabbing development. The Lumia 520, despite its age, can run full desktop Windows 10 — not Windows Mobile. However, the 520 is the absolute minimum spec. discussing the benefits