Do you have the same problem? I recently bought a new i-phone 4 and obviously sync with my new i-mac where I previously sync with my old i-phone 3. Yup, all the data that needed to be transfered from my old set to my new i-phone 4 were transfered; eg. contacts and pics. No complaints about that bit. Here's my dilema: On the top left hand corner, just next to the signal strength bar indicator it should display the local carrier service provider indicator which is 4G but mine is still showing 3 (2G). A friend of mine had the same new i-phone 4 and it display 4G. I went to SETTING and tap to CARRIER and it auto search for carriers and still it shows 3(2G). So weird? Any clue? Glad if anyone can offer advice as it has been bugging me. Thank you. By the way, I live in Hong Kong.