My phone was jailbroken and unlocked to 1.1.3.
Now by the accident recovery mode was made and the 1.1.2 firmware downloaded. Now phone shows slide for emergency and connect to iTunes (i got 7.6). when I connect to iTunes it shows do you want to activate with at&t or if there is different sim card it shows that the sim card is unsupported.

I would be more then grateful if someone could help me and tell me what to do (how to repair it).

Thank you