Audio and Connectivity
For audio, the D900i includes a loudspeaker and supports various alert types such as vibration, polyphonic, and MP3 ringtones. However, it lacks a 3.5mm headphone jack, meaning users must rely on compatible Bluetooth headphones or speakers. Connectivity-wise, it offers Bluetooth 2.0 with A2DP for wireless audio and USB 1.1, which sufficed for basic data transfer operations.