Apple iPhone 4 Audio and Connectivity

Audio and Connectivity

The device featured a standard 3.5mm headphone jack and a competent loudspeaker, with various tests noting voice, noise, and ring sounds ranging from 60dB to 66dB. Audio quality was robust, with detailed noise and crosstalk performance. Connectivity options included Wi-Fi 802.11 b/g/n, Bluetooth 2.1 with A2DP, GPS, and A-GPS capabilities. However, the lack of radio and USB 2.0 represented minor limitations in connectivity options.