Apple today officially announced the iPhone 4S, the fifth iteration of its trend-setting handset. As expected, the iPhone 4S retains the external design of the CDMA variant of the iPhone 4, save for the microSIM slot which is now found on the side opposite the volume buttons. The handset offers dual-mode CDMA + GSM compatibility, and uses a unique antenna system that lets it intelligently switch between two antennas to transmit and receive for improved…
