Looks like some people are binary editing the Lenovo supplied BIOS to hack in the PCI ID of their WWAN cards.

Your X201 has decent support in the free coreboot BIOS, so if you fancy a weekend project you can ditch the WWAN whitelist altogether:

http://www.coreboot.org/Board:lenovo/x201

Yeah I did this when I had a T61 so I could enable SATA2.

Thanks for the heads up with CoreBoot