Hi,
I've got an iPhone 3G 8GB jailbroken/unlocked. my carrier signal is working fine and everything too. But I can't make or receive calls and send messages. I restored it and it's still the same. Can anyone help me???
I don't know much about unlocking but did you turn off the 3G signal before running whichever program you used? I think there are issues with unlocking if you aren't using the Edge signal from the start.
Not enough information given to help you; but, if you live in Canada and are on the Rogers/Fido network, then it's been down for about 18 hours so far.