There are for Lumia 520.
While the Microsoft Store theoretically works, modern Universal Windows Platform (UWP) apps crash instantly due to Out-Of-Memory (OOM) errors.
: Most builds suffer from broken camera, GPS, audio, and handset jack functionality. nokia lumia 520 custom rom work
Tackle this project if you have a dusty Lumia 520 in a drawer and you want to turn it into:
(For backup and emergency recovery). WPInternals Tool (To unlock the bootloader). A custom image/ROM (Usually found in XDA Forums). 6. How to Flash (Basic Steps) There are for Lumia 520
Modifying a Lumia 520 requires a Windows PC, a reliable micro-USB cable, and patience.
If you want, I can:
If you want more from your Lumia 520: