A videophone device including two units 30, 34 is disclosed. When decoupled from each other, the first unit is a mobile phone 34 (for example, a cellular phone or a VOIP phone) that provides voice telephony services, and the second unit 30 is a video playback device (for example, an MP4 player) that provides media playback services. When coupled to each other to form a `tandem device` 32, the tandem device 32 is operative to provide video telephony services using an onboard CODEC 224 of the media playback device, a screen 250 of the media playback device, and an RF transceiver 130 of the mobile phone. Various packaging features are disclosed. A tandem device including a screenless GPS device 330 and a mobile phone is also disclosed herein.