Dear friend, We would like to buy lots of CDMA express card and modem, part of their technicial requirements are listed below: a) Wireless data at speeds up to 2.4 Mbps on CDMA 1X EVDO Rev 0, 800MHz networks b) Back wards compatible to CDMA 1X RTT 800MHZ c) Supports incoming call display, SMS and data capabilities simultaneously d) Optionally supports R-UIM  e) Plug-and-play and hot swappable, without requiring a reboot f) Express Card/34 Interface g) External Flip up antenna h) Embedded diversity (receive) antenna i) Provision for connection of external booster antenna j) No remote power needed Power comes from Express Card/34 slot k) Supports Windows of all version for 2000/XP/Vista, Linux, and MAC OS X 10.3.9 and  above. EVDO USB Modem Specification: a) Wireless data at speeds up to 2.4 Mbps on CDMA 1X EVDO Rev 0, 800MHz networks b) Back wards compatible to CDMA 1X RTT 800MHZ c) Supports incoming call display, SMS and data capabilities simultaneously d) USB 2.0 interface e) Supports R-UIM