Compatible models: (Other IBM/Lenove models, please send email to ask.)

A20m, A21m, A30, A31(a few buyers have still required the CMOS mod with the A31)
R51, R52
T20, T21, T22, T23, T40, T40p, T41p, T42, T43
X22, X40, X41
Z60m

If you receive the "1802 Unauthorized network card is plugged in. Power off and remove the Mini PCI network card...." message on your IBM laptop (and you've purchased one of these IBM cards and it is listed below in the section that buyers have reported to be compatible without the CMOS modification), you may need to upgrade the BIOS on your laptop to the newest revision. While upgrading your BIOS is quite routine, follow your manufacture's directions exactly and if you are doing a BIOS upgrade from within Windows, DISABLE YOUR VIRUS CHECKER until after it is installed. BIOS upgrade issues need to be handled by your laptop manufacturer. While uprading your BIOS may be neccessary for these cards to be recognized, we take no responsibility for it and upgrading your BIOS is done at your own risk.

Where you can get the driver:

Download from IBM .

You can get the latest BIOS revisions for most IBM laptops from here; you may need to use the newest BIOS revision in order to avoid a BIOS lock.