I have an Iphone 3gs that I previously had jailbroken and unlocked. I recently tried to update it or something on Itunes and they erased Cydia from my Iphone so I no longer had service. I then restored it to try and fix the problem. After it was restored, I went through the steps: language, country, enable location services, wifi, and then comes the step to activate the phone. Since I have a T-Mobile sim card in, it says "Your Iphone could not be activated because the activation server is temporarily unavailable." When plugged into Itunes, it says "There is no SIM card installed in the Iphone you are trying to activate" I cannot get past this, PLEASE help, I need the phone to be in use as soon as possible. Thanks in advance for your help.