Nokia Lumia 520 Custom Rom Work -
Requires a registry hack to "disguise" the 520 as a supported model (like the Lumia 635) to receive over-the-air updates.
Active sources (as of 2025, mostly legacy):
| ROM Name | Base OS | Stability | WiFi | Bluetooth | RIL (Calls/Data) | Camera | Daily Driver? | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | | Android 4.1.2 | 9/10 | Yes | Yes | Yes (2G only) | Yes | Yes (As a music player) | | KitKat 4.4.4 (Halium) | Android 4.4.4 | 6/10 | Yes | No | No (SMS only) | No | No | | Ubuntu Touch 16.04 | Ubuntu Linux | 7/10 | Yes | Yes | No | No | No (Cool tech demo) | | Windows 10 RT | Windows 10 IoT | 4/10 | Yes | No | No | No | No | | Stock WP 8.1 GDR2 | Windows Phone | 10/10 | Yes | Yes | Yes | Yes | Yes (Legacy use) | nokia lumia 520 custom rom work
Disclaimer: Modifying your phone's firmware carries a risk of permanently bricking the device. Proceed at your own risk. Step 1: Back Up and Prepare
Access older Android APKs (if Android is installed). Requires a registry hack to "disguise" the 520
Because of these strict hardware limitations, running modern operating systems is a massive challenge. Custom ROM development for the Lumia 520 generally falls into two distinct categories: upgrading to newer, unsupported versions of Windows Mobile, or cross-flashing the device with lightweight versions of Android.
Custom ROMs for this device are rarely stable enough for a daily driver. They are primarily for hobbyists interested in legacy hardware hacking . Proceed at your own risk
To help you get started on your specific device, let me know:
Custom ROM development for the Nokia Lumia 520 (RM-914/915) is a niche but active hobbyist field focused on reviving this legacy hardware. While the device originally shipped with Windows Phone 8, modern development centers on and Windows 10 Mobile upgrades. 1. Android Custom ROMs (Android4Lumia Project)
The dual-core processor and low RAM make modern apps nearly unusable on any OS version.
