raja@badfox:~$ sudo lsusb
[sudo] password for raja:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 007: ID 12d1:1436 Huawei Technologies Co., Ltd.
raja@badfox:~$ sudo ls /dev/ttyUSB*
/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2
raja@badfox:~$ sudo apt-get install wvdial ppp
Reading package lists... Done
Building dependency tree
Reading state information... Done
ppp is already the newest version.
wvdial is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
raja@badfox:~$ sudo apt-get install ppp
Reading package lists... Done
Building dependency tree
Reading state information... Done
ppp is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
raja@badfox:~$ gksudo gedit /etc/wvdial.conf
raja@badfox:~$ wvdial hspda
--> Can't open '/etc/wvdial.conf' for reading: Permission denied
--> ...starting with blank configuration.
--> WvDial: Internet dialer version 1.61
--> Warning: section [Dialer hspda] does not exist in wvdial.conf.
--> Cannot open /dev/modem: No such file or directory
--> Cannot open /dev/modem: No such file or directory
--> Cannot open /dev/modem: No such file or directory
raja@badfox:~$ sudo wvdial hspda
--> WvDial: Internet dialer version 1.61
--> Warning: section [Dialer hspda] does not exist in wvdial.conf.
--> Cannot open /dev/modem: No such file or directory
--> Cannot open /dev/modem: No such file or directory
--> Cannot open /dev/modem: No such file or directory
raja@badfox:~$ cat /etc/wvdial.conf
cat: /etc/wvdial.conf: Permission denied
raja@badfox:~$ sudo cat /etc/wvdial.conf
[Dialer hsdpa]
Phone = *99#
Username =
Password =
Stupid Mode = 1
Dial Command = ATDT
Modem = /dev/ttyUSB0
Baud = 460800
Init2 = ATZ
Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem
raja@badfox:~$