raja@badfox:~$ sudo wvdial hsdpa
--> WvDial: Internet dialer version 1.61
--> Cannot open /dev/ttyUSB0: Device or resource busy
--> Cannot open /dev/ttyUSB0: Device or resource busy
--> Cannot open /dev/ttyUSB0: Device or resource busy
raja@badfox:~$ sudo wvdial hsdpa
--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
OK
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT*99***1#
--> Waiting for carrier.
^Z
[1]+  Stopped                 sudo wvdial hsdpa
raja@badfox:~$