[Nasart]

What will happen if reset ed my Lumia 520 to factory settings after updating to 8.1,will it go back to 8.0 ?
I'm doing this to change the main Microsoft account on my device .

[N_LaRUE]

If you're hard resetting then no, it won't go back to W8.0.

[DamjanPetkovic]

It will be 8.1 , try Nokia Software Recovery Tool if u want 8.

[Nasart]

Well thanks ,but is there any easier way to change the main Microsoft acount ?

[N_LaRUE]

Well thanks ,but is there any easier way to change the main Microsoft acount ?

Nope. That's the only way.

Keep in mind if you change your MS account you lose everything that's connected to it.

[Microsoftjunkie]

Search for an article here. You CAN change your MS without resetting your device. Don't remember the article title tho.