Originally Posted by
redtraveler
Ok-I just read about Fring--won't that cause my data charges to rack up?
Not if you use WiFi.
But I have another question. Does the iPhone 3G require 3G SIM's? Or if you unlock it can you pop in any old 2G SIM? I know you would need a 3G SIM to use 3G data, but can you use an ordinary SIM for phone calls?