I have a problem with the SAM (from repo.bingner.com) thing. Here is what happened.
I wanted push notification and imessage on my recently jailbroken iphone 4 which uses Gevey Ultra for unlock. So I installed the SAM and I started following the steps. I went as far as clicking the ‘Revert lockdown to Stock’ which gave me a successful message, then I was supposed to sync with itunes, but I tunes said that my sim was invalid and stuff but I was still using the iphone. So I tried again and again no luck. Then I thought it would be a good idea to uninstall the SAM thing and then I rebooted my iphone. Now just when the iphone is on, it says connect to itunes and makes me choose wi-fi networks. When I connect to itunes, it says, ‘The sim card inserted in this iphone does not seem to be supported’. Im living in Africa, so there is no way I can get the official sim card. What can I do please tell me. My iphone is unusable for now. Should I try to restore from a backup or something…?
The phone is iphone 4, ios 5.0.1, Gevey Ultra unlocked, baseband 4.10.01, and was jailbroken.
Please HELP!!!!!

You should have read the SAM instructions further

A) Just 'revert lockdownd to stock' is not all you need to do. You also need to hit 'deactivate' in the SAMPrefs app, then reboot the phone, then attempt to activate in iTunes.
B) If activation fails after that, open SAMPrefs and manually set your carrier and country and SIM preferences, then reboot the phone, then attempt to activate in iTunes. This really should work.
C) If THAT all fails, then your carrier may require a network profile (.IPCC) in order to gain service and activation -- I'd know more if you let us know the server.