A wireless mobile phone is provided with an input-output interface and an output interface. The input-output interface may be employed singularly to facilitate removable attachment of a telephony headset to the phone to receive at least telephony audio signals from the phone, and to provide audio signals to the phone. Similarly, the output interface may be employed singularly to facilitate removable attachment of an audio output only headset to the phone to receive at least a selected one of telephony and non-telephony audio signals from the phone. However, the input-output interface and the output interface may also be used jointly to facilitate removable attachment of a two-plug headset to the phone to receive at least a selected one of telephony and non-telephony audio signals from the phone, and to provide audio signals to the phone.