For Linux Ubuntu 7.04
Copy the Linux_Ubuntu Folder from your device to your Desktop
Open terminal 
Cd to Desktop/Linux_Ubuntu
Run "sudo ./connect"
Enter root password
Device will switch to modem mode and attempt to connect. 

Press Ctrl-C twice to disconnnect

For Linux Ubuntu 7.10 User
Copy to desktop all files except 'itfchg'
Open terminal and type "sudo ./itfchg /dev sd?" 
"?" being where the U680 is located. It may be ¡°sda¡± or ¡°sdb¡±.
Run "execute.sh" and the modem will activate and connect to the internet.

Anyone one who has used Linux for more than a day will be able to do this without effort. 

