How do i download windows 8.1 or higher os for my lumia 520?

[JohnneyJay1]

How do i download windows 8.1 or higher os for my lumia 520?
My phone got Corrupt with a virus. & was flashed; this led me into windows 7, how do i download an upgrade? Pls help! Thanks.

 

[charlatan1978]

Hi, the Lumia 520 came with Windows Phone 8, so if it has been reflashed that is what you should have.
If you check for updates what happens?

 

[shmsnh]

In case you are not convinced, you can use the Windows Device Recovery Tool to flash the appropriate firmware onto your phone.