One of the big talking points after the release of the iPhone 4 was the so called antennagate problems. You must remember that; Apple introduced its free bumper program to quell the discontent. Apple claims to have improved the antenna on the iPhone 4S but what have they done and how does it work?
Improving on the innovative stainless steel external, dual-antenna design of iPhone 4, iPhone 4S is the first phone to intelligently switch between two antennas to send and receive. iPhone 4S now supports twice the download speed with HSDPA of up to 14.4 Mbps and iPhone 4S is a world phone, so both CDMA and GSM customers can now roam internationally on GSM networks.
MacRumors spoke to Spencer Webb, owner of AntennaSys who had already written extensively about the original iPhone 4 antenna problems. He claims that Apple moved the GPS and Wi-Fi antennas in the Verizon CDMA iPhone and turned the top antenna into a second separate antenna. This gave it spatial diversity which in simple terms gives it the ability to switch antennas if one has a poor signal.
The Verizon iPhone 4 only had “receive diversity” or switching between antennas on the receiving data. The iPhone 4S on the other hand has both “send and receive diversity”; which should lead to a much improved call experience. Let’s hope so as the iPhone gets a lot of criticism for its poor call quality and stability.