My Laptop (Acer Aspire 4520) is running Ubuntu 7.04 (Feisty Fawn), my phone (sorry, my girlfriend's phone pala. Thank you Erin for lending me. Ganda ng kulay ng phone mo... kulay arbor. he he he. I love you) is a Nokia 6233 model and using Smart Network. I am using a usb cable to my phone.  Let's get started.

Plug your phone to the usb port. Now let's check if your mobile phone is being recognized. Open a terminal console and issue a command

alex@alex-laptop:~$ lsusb

and you will get an output something like

Bus 001 Device 004: ID 0421:0491 Nokia Mobile Phones
Bus 001 Device 003: ID 15ca:00c3  
Bus 001 Device 001: ID 0000:0000  
Bus 004 Device 002: ID 064e:a101 Suyin Corp.
Bus 004 Device 001: ID 0000:0000  
Bus 003 Device 001: ID 0000:0000  
Bus 002 Device 001: ID 0000:0000  

Then run the following command

alex@alex-laptop:~# sudo  wvdialconf create

and you will get an output similar to this

Editing `create'.

Scanning your serial ports for a modem.

Modem Port Scan<*1>: S0   S1   S2   S3   
WvModem<*1>: Cannot get information for serial port.
ttyACM0<*1>: ATQ0 V1 E1 -- OK
ttyACM0<*1>: ATQ0 V1 E1 Z -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
ttyACM0<*1>: Modem Identifier: ATI -- Nokia
ttyACM0<*1>: Speed 4800: AT -- OK
ttyACM0<*1>: Speed 9600: AT -- OK
ttyACM0<*1>: Speed 19200: AT -- OK
ttyACM0<*1>: Speed 38400: AT -- OK
ttyACM0<*1>: Speed 57600: AT -- OK
ttyACM0<*1>: Speed 115200: AT -- OK
ttyACM0<*1>: Speed 230400: AT -- OK
ttyACM0<*1>: Speed 460800: AT -- OK
ttyACM0<*1>: Max speed is 460800; that should be safe.
ttyACM0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK

Found an USB modem on /dev/ttyACM0.
Modem configuration written to create.
ttyACM0<Info>: Speed 460800; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"

Above means that your modem(cellphone) is connected at /dev/ttyACM0

Next, lets edit the wvdial.conf created by the previous command. Issue the vim command (or you can use gedit as an editor)

    alex@alex-laptop:~$ vim /etc/wvdial.conf

Replace anything written  with the following, changing the modem entry with your modem. In my case it's /dev/ttyACM0. Also change the username with the mobile number of your phone. It's in the format +639XXXXXXXXX

[Dialer Defaults]
Modem =  /dev/ttyACM0
Baud = 230400
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem
Phone = *99***1#
Username = (your mobile number here)
Password = B
Stupid Mode = 1

We are all done at this point. On the terminal console type

alex@alex-laptop:~$  sudo wvdial

Congratulations, you are now connected to the internet using GPRS with the following output on your terminal

--> Carrier detected.  Starting PPP immediately.
--> Starting pppd at Wed Aug 15 01:08:37 2007
--> Pid of pppd: 8555
--> Using interface ppp0
--> pppd: �[10][06][08]H [06][08]
--> pppd: �[10][06][08]H [06][08]
--> pppd: �[10][06][08]H [06][08]
--> pppd: �[10][06][08]H [06][08]
--> local  IP address 10.157.147.114
--> pppd: �[10][06][08]H [06][08]
--> remote IP address 10.6.6.6
--> pppd: �[10][06][08]H [06][08]
--> primary   DNS address 203.172.28.136
--> pppd: �[10][06][08]H [06][08]
--> secondary DNS address 202.57.67.45
--> pppd: �[10][06][08]H [06][08]


I hope this helps you. Happy Surfing. To disconnect just press CTRL+C

source http://sealex.blogspot.com