Audio and Connectivity
An intriguing feature of the i-mobile 520 is the inclusion of a Yamaha audio amplifier, which suggests a focus on sound quality, despite its lack of a loudspeaker and reliance on vibration and downloadable ringtones for notifications. Bluetooth 2.0 with A2DP is available for wireless audio streaming and data transfer, which was a reasonably advanced connectivity option at the time, even without WLAN or GPS capabilities. The phone also supports FM Radio, catering to users interested in on-the-go entertainment via traditional radio. Connectivity is further supplemented by a proprietary USB connection, limiting the ease of compatibility with universal charging ports or data transfer hardware.