AT&T

USB

Sierra Wireless 881U
Sierra Wireless 875U
USBConnect 881

ExpressCard

²Option GT Max 3.6 Express
²Option GT Ultra Express

Phones

Blackberry 8310 (Curve)
HP iPaq 910
Motorola RAZR v3xx
Motorola Q v9h
Samsung Blackjack
Samsung SGH-A707

Rogers (Canada)

USB

Novatel MC950D

ExpressCard

Novatel X950D

Telus (Canada)

USB

Sierra Wireless 595U

ExpressCard

Sierra Wireless 597E

Verizon

USB

Novatel USB720
Novatel USB727
Sierra Wireless 595U
UTStarcom UM150
(Pantech UM150)
UTStarcom UM175

ExpressCard

Kyocera KPC680
Novatel V740

Phones

Blackberry 8703e
Blackberry 8130
Blackberry 8330
Blackberry 8830
LG VX7200
LG VX8000
LG VX8300
Motorola RAZR V3c
Palm 700p
Palm 700w
Verizon XV6800

1- The user experience with devices running Windows Mobile is less robust than other phones and modems. Windows Mobile devices connected to either a PC or a CradlePoint router have exhibited erratic behavior while using data sharing capabilities. Issues include frequent disconnects for no apparent reason and remedies entail frequent rebooting the phone and or removing the phone's battery. This problem is not something that can be resolved by CradlePoint Technology and will need to be addressed by the phone manufacturer. Please refer to our release notes. 
2 - These modems can take up to 2.5 minutes to make a data connection. In our tests, they appear to spend a long time attempting to get a signal before they can make a data connection. The Ultra seems to connect more quickly in our tests. Note that the the Ultra Express' performance in the router is not as good as in the PC. This modem works with the router, but if you have a choice any of the other GSM modems such as the Novatel or Sierra Wireless are more compatible.