[erfan]

hey everybody.. i am havin a problem .. i just upgraded my phone from 1.0.2 to 1.1.2 with all the steps corectly n now i want to use my simcard but in everywhere i red and saw on youtube that i need anysim 1.2.1 u and i took out the sim card and once i put it on airplane mode and both times the at the aplication that thing comes which means its loading something .. and after a time the phone restarts and the apple sign comeas and that things rounds and rounds and after a while it stopes and the phone disconnects and than it starts doing that again