The W-Sim card, it a new invented SIM card which is bigger than the normal SIM card. It is a new technology used by Japanese PHS operator Willcom. Though is big but it is useful it can store your user data and also all the transmission technology needed for a mobile device to work, the built in antenna. There’s one company from Japan making 5000 pieces of wrist watch phone (pic above). This wrist watch phone accept the W-Sim to enable the wireless connection. The wrist watch also allow you to receive media streaming and watch it through its 2.4-inch LCD screen display. It measures 89.5 x 58 x 22.3mm and weighs 120g.

[via Slashphone]