Hi friends here is my another ubuntu how to.
I did this today morning for my friend who purchased a new BSNL USB modem (model: Huawei EC325). He asked me configure his ubuntu 8.04 for connecting net through the BSNL USB modem.
After a little bit of googling I came to know about the procedures.
Please continue reading to know the step by step procedures.
1. Go to terminal (application > accessories > terminal )
2.Then type the following line in terminal.
sudo gedit /etc/wvdial.conf
It will ask the login password give it (remember it won’t appear still you can enter the password). Then hit enter
3. Now a text editor will open the wvdial.conf file then add the following content in that file
[Modem0]
Modem=/dev/ttyUSB0
Baud=115200
SetVolume=0
Dial Command = ATDT
init1=ATZ
init2=AT+CRM=1
FlowControl= Hardware (CRTSCTS)
[Dialer BSNL]
Username=
Password=
Phone=#777
Stupid Mode= 1
Inherits = Modem0
After adding the above content.
4.Change the line Modem=/dev/ttyUSB0 to what ever your device name is, you can see the device name using following command and search in the result which appears after entering it.
dmesg
Almost all the will have name “ttyUSB0″ as device name better confirm it by giving the “dmesg” command
5.Then Enter your Username and Password which is given to you while you are purchasing the USB modem.
See the example
Username=abttech
Password=123456
After adding that username and password to that content save your file.
6.Now come back to terninal then type the below command
sudo wvdial BSNL
Hit enter. After that connection will be established. Please remember don’t close the terminal window. If you close it you will lose the connection.
7.Now open the firefox and disable the work offline option (file > work offilne)
Ya you are done enjoy using internet in Ubuntu.
If any help or suggestion please don’t forget to comment

Nice tip keep it up
please update daily i want to need more abt technology
@gobinath Thanks for your comment! here after abbtech going to post more abt technology. So stay tune and keep commenting….
-AbtTech
pl. can u tell me about price and tarrif plans about this usb modem
It’s good to see this post. Can you update the same for ubuntu 9.10?
can u tel me abt tarif plans and price and net work coverage?