i hav updated my itunes 2days ago,after i synced ma phone,after dat 3g is not working,it shows the 3g receptionicon,but wen i open the safari it sayin it is not connected to the internet,however wifi is working.i tried restoring the firmware n the 3g works jus fine again wen i jailbreak it same problem.Anyone have any idea,or anyone having the same problem...please help..thank you

iphone 3g
2.2.1 firmware