Lenovo ThinkPad X201 Tablet - Manual (Page 3)

Make sure of the following conditions when you use any other external RF
option device:
1.
When you use any other RF option device, you are requested to confirm
that the device conforms to the RF Safety requirement and is approved to
use for your computer.
2. You must follow the RF Safety instructions of the RF option device that
are included in the user manual of the RF option device.
3. If the RF option device is prohibited to use in conjunction with another
transmitters, you must turn off all other wireless features in your
computer.
ThinkPad Regulatory Notice for the Wireless WAN Adapter
3