Chinese company Naxin has developed a cellphone known as the NX788. This GSM dualband handset comes with a standard Bluetooth headset located behind which can be unlatched when required, and placed in position whenever you need to charge it.
In addition, the NX788 boasts Bluetooth A2DP support and a dual SIM card function, a 1.3 megapixel camera, a microSD memory card slot, the ability to play MP3 and MPEG-4 files as well as a QVGA touchscreen display. It currently retails in Hong Kong for $190.