A wrist watch that has capability to handle two sim cards. Yes this is a very innovative and accessible solution. Handyuhr a swiss manufacturer did this new wrist phone called the iWatch M860.
Specifications of the wrist watch are:
Two SIM card
* Networks GSM / GPRS (900/1800/900 MHz)
* 1.4-inch touch-screen TFT display with a resolution of 128×160 pixels and support 260K colors
* Interface Bluetooth, USB
* SD slot (memory cards up to 16 GB)
* 1.3 MP camera
* MP3 player
* Support for WAP
* Recorder
* Talk time is up to 3 hours
* Standby time is up to 160 hours
* Dimensions is 75×52x18 mm
* Weight is 69 grams
Source: www.handyuhr.ch