Originally Posted by
Mike Cloak ok i an do that, are there any instructions on how to do so
There is a sticky with video instructions in the 920 forums which covers how to dead flash a 920, you can replicate it for your 520. You model variant is RM-915 so search for Lumia 520 Product Code and look for the RM-915 variant.
Edit: You can flash this firmware product code:
059S2X9 RM-915 VAR BR CV
You'll have more insight after watching the video. The process is safe if done carefully. And I've personally used the above firmware on 2 of my 520s and they were stable and completely unbranded.
Good luck!