I currently have a 3gs on 4.01 and it is has been jail broken via the the jailbreakme.com route, it's on an 02 contract and I recently used there free unlock policy. The phone has now been unlocked officially by them and I have tested it working all ok.

Now I would like to update to 4.1 because I think it may cure a Wifi problem I am experiencing however I know that when I update then the baseband is also updated, I know I could go down the route of umbrella and all that but just trying to keep it simple.
So if the phone has already been carrier unlocked officially then is this update going to lock it back to 02?


Regards
Les