Survey conducted by Wired Magazine revealed that 3G Apple iPhone users who are experiencing poor reception is due to the the fault of the carriers that provide service, rather than the fault of 3G iPhone devices. 3G iPhone users from US have been complaining about the speed.
Here is the experts from the from the survey.
In USA Sprint career gets the new iPhone Killer, Samsung Instinct Internet-enabled multimedia smartphone. The Samsung Instinct is Sprint latest answer to Apple’s iPhone offered by AT&T. The Instinct supports both EV-DO Rev. A, GPS and Bluetooth connectivity and visual voice mail. There is also an external memory card slot that supports up to 8GB.