All thinkpads have a Wifi card whitelist at the BIOS level that prevent installing certain WiFi cards. The restriction can be bypassed with a BIOS modification: Either installing Libreboot, Coreboot or editing the official Lenovo/IBM BIOS.
In general, this machine works well. It seems impossible to change the wireless card and the builtin wireless card isn't really reliable. It is unclear if it is a firmware problem or just the design of the wireless card, but signal is often weak and the "bars" always look full even if the signal is weak. See also http://www.thinkwiki.org/wiki/Category:X120e3G cards | 33 |
Acquisition cards | 34 |
Bluetooth | 56 |
Ethernet cards | 170 |
Fingerprint readers | 11 |
Host Controllers | 170 |
Modems | 18 |
Notebooks | 785 |
Printers | 125 |
RAID adapters | 20 |
Scanners | 24 |
SD card readers | 56 |
Sound cards | 140 |
Video cards | 341 |
Webcams | 132 |
Wifi cards | 228 |
TOTAL | 2343 |