Originally Posted by
I3unny I have a Lumia 520 Denim.. Is there any possible way to revert back to windows phone 8?? I really wanna play some games but they lag like hell on windows phone 8.1 :(
The Lumia 520 was released with Windows Phone 8.1. Hence, you can NOT revert "back" to Windows Phone 8. You may, however, flash a different OS version into your phone, but that is highly un-recommended.
On the other hand, the lag may not be caused by the OS version, but rather by the relatively lower specifications of the L520.
Reference.
Erratum: the website was referring to the current software release available for the L520, not the software available at the initial release date.