W-SIM

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Combined SIM card and cellular phone developed by Willcom

title: "W-SIM" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["mobile-technology"] description: "Combined SIM card and cellular phone developed by Willcom" topic_path: "general/mobile-technology" source: "https://en.wikipedia.org/wiki/W-SIM" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Combined SIM card and cellular phone developed by Willcom ::

thumb|W-SIM （RX420AL） 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 !
  • :Hand-set terminal by Bandai. The internal code is WS006.

References

References

  1. McNulty, Liam. (22 October 2005). "A closer look at Willcom's W-SIM".

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mobile-technology