A'een Hisham

How can I restore my unlocked iPhone 3GS?

25 Sep 2012
Windows
Chrome 21
25 Sep 2012 | Windows | Chrome 21

I have a iPhone 3gs that was unlocked and jailbroken. My girlfriend updated the phone, and now it is in activation mode and wont read the SIM card that was in it. How do I restore the phone so that it works again ?