Your device has been modified support needed

[Mruntrackable]

Hey guys im new here !!

My issue is i have a samsung galaxy s2 that was rooted i unrooted it and factory reset it twice and followed a few threads but nothing has worked it still says my device is modified so i cant update its firmware

someone please help !

 

[Mustang02]

Did you flash it back to stock? I'm assuming by you rooting it you changed system files, deleted apps, etc? Doing a factory reset will not put the phone back to stock form. You need to flash the stock image to accomplish this.

 

[Mruntrackable]

Flash? Don't think so. And I just rooted the phone and nearly did much on it so I decided to unroot which I did and now I cant do much of anything and I want to update my firmware. Please help me with this thanks