I use x-sim to unlock my iphone 3g.
I can make calls and send SMS, but i can't receive calls or SMS.
My FW is 2.02 JailBreak.
My X-sim : http://dual-sim.ocnk.net/product/243
Please change the title of this thread to "SOME X-Sim's cannot fully unlock iPhone 3G" due to the fact that I have been fully unlocked for over a month. No problems.