Using AnyData ADU-510A CDMA modem under Linux is a bit of a challenge because the device will appear like a virtual CD-ROM instead of a modem. You will need to "switch" the device (meaning turning it from being a CD-ROM to a modem), and then connect through PPP to your provider's network. Here are detailed steps on how to accomplish this on Ubuntu 10.04, using the modem associated with Romtelecom Clicknet Mobile service. It should work the same for other providers. 1. Download Saki's3g - a script that automatically switches your device from a CD-ROM state to a modem. You can get the latest version from http://www.sakis3g.org/ (great work, Saki!) Even if the site says it doesn't support CDMA networks, it can still be used to switch our modem using the embedded usb_modeswitch. Download the full version for your architecture and gunzip it somewhere in your home directory (~/bin for example). Also, give execute permissions to the script: adrianp@stingray:~/b