In order to get Reliance USB Data Card to work in Ubuntu, follow these steps:

1. Make sure wvdial is installed
   sudo apt-get install wvdial
2. Add the device configuration to your /etc/wvdial.conf

   Replace <phone-number> with your 10 digit Reliance connection number.

   
[Dialer Defaults]
Phone =
Username =
Password =
New PPPD = yes


[Modem0]
Modem = /dev/ttyUSB0
Baud = 115200
SetVolume = 0
Dial Command = ATDT
Init1 = ATZ
FlowControl = Hardware (CRTSCTS)


[Dialer cdma]
Username = <phone-number>
Password = <phone-number>
Phone = #777
Stupid Mode = 1
Inherits = Modem0


3. Run wvdial
   
   sudo wvdial cdma

   You will see some output like this:
   
~$ sudo wvdial cdma
--> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Modem initialized.
--> Sending: ATDT#777
--> Waiting for carrier.
ATDT#777
CONNECT 230400
--> Carrier detected. Starting PPP immediately.
--> Starting pppd at Sat Jul 11 22:56:19 2009
--> Pid of pppd: 4299
--> Using interface ppp0
--> pppd: ????[18][18]m X[19]m
--> pppd: ????[18][18]m X[19]m
--> pppd: ????[18][18]m X[19]m
--> pppd: ????[18][18]m X[19]m
--> local IP address <IP>
--> pppd: ????[18][18]m X[19]m
--> remote IP address <IP>
--> pppd: ????[18][18]m X[19]m
--> primary DNS address <IP>
--> pppd: ????[18][18]m X[19]m
--> secondary DNS address <IP>
--> pppd: ????[18][18]m X[19]m
--> pppd: ????[18][18]m X[19]m
--> pppd: ????[18][18]m X[19]m


That’s it! You must now be able to browse the Internet. In order to disconnect press Ctrl+C.