W-SIM (Willcom-SIM) is a SIM card developed by Willcom which, in addition to standard SIM functions, also has the core components of a cellular telephone (PHS), such as the radio receiver/transmitter, built inside. It is currently used in some terminals (listed below), which do not have radio modules. The W-SIM core module is an extended version of a SIM card, containing not only user data but also all the transmission technology needed for a mobile device to work. A terminal device developer can build a customized terminal without the design and development of a radio module, and users can change to a different radio module W-SIM without changing the terminal itself. Similar to traditional handsets made by WILLCOM, W-SIM terminals can be used in Japan, including global roaming with Taiwan and Thailand. For Mainland China, China Netcom had W-SIMs available, though its PHS network is due to be phased out this year. In addition, a GSM version called the CM-G100 had been developed for use in other countries.
WILLCOM branded terminals WS001IN / "TT" Hand-set terminal by Net Index. WS002IN / "DD" Data communication terminal by Net Index. WS003SH / W-ZERO3 Hand-set terminal(smartphone) by Sharp. WS004SH / W-ZERO3 Hand-set terminal(smartphone) by Sharp. Higher-spec version of WS003SH. WS005IN / nico. Hand-set terminal by Net Index. WS007SH / W-ZERO3 [es] Hand-set terminal(smartphone) by Sharp. Stylish and slender version of W-ZERO3. WS008HA / WS008HA ExpressCard data communication terminal by Hagiwara Sys-Com. WS009KE / 9(nine) Hand-set terminal by KES.
Terminals branded by other than WILLCOM Kids Ke-tai papipo! Hand-set terminal by Bandai. The internal code is WS006.
References
External links Willcom Inc.'s page Archived 16 February 2006 at the Wayback Machine Engadget entry TT Phone DD "Data Driver" Archived 16 February 2007 at the Wayback Machine Sharp W-Zero3 PDA phone