I would say power the phone off and remove the SIM give it a minute pop the SIM back in and power it back on and see how the phone is, try using someone else's SIM from a different network to see if it's any different. What did you use to do the unlock?(Info might be good for others who chime in) Is there anything else that doesn't work? Otherwise check the info you used to unlock and JB double check to make sure it is correct and restore and redo the process.
actully i did twice & reboot . it didnt work. i read some articles, might new version Download iPhone firmware 3.0 (filename: iPhone1,1_3.0_7A341_Restore.ipsw) has problem, im looking for old version to see