activated my new iPhone 4s. jail broke it through redsn0w using cydia and install SAM PREF so i could unlock the phone and use a german sim card. everything was working perfectly fine and then somehow the SAM PREF got uninstalled from cyida and now my phone is saying that i need to activate it again. the phone was originally from AT&T but the sim that i used to first activate no longer works. i tried the whole hacktavate thing where you dial a number end the call and hold the power and home button to bypass the activation but i get a message saying that only emergency calls can be made. i have tried restoring the firmware 5.1.1 but get an error 21 message... I'm completely lost any ideas anyone?