ok i have this problem and i wana know why is this happening.
First of i need to say that i have 4 iphone 3 are 3gs and 1 is 3g
2 of the 3gs are new ( new meaning are bought in store)
1 3gs and the 3g are refurbished from apple.
now my problem is everytime i restore the phone than activate with att sim jailbreak and unlock after i change the sim card with a tmobile card.
the 2 new 3gs work fine
the 2 refurbished phone say deiferent sim detected conecto to itunes.
why the refurbished phones do that and the non refurbished phones dont?