Iphone 4g jailbroken No signal

[necromanzer]

I jailbroke my iphone with Redsn0w 0.9.6rc15 then I realized I have no signal.
Network : Not Available
Version: 4.3.3 (8J2)
Carrier Not Available
Modem Firmware: 4.10.01

I need useful answers. Thank you very much