using 3G usb modem with linux (ubuntu 8.04)

Today i have a hand on a 3G usb modem and i was sad that it only has drivers for both windows and Apple
so i connect it to windows to see how it works
it install the driver automatically and then a software is installed that allow it to dial by just clicking Connect (easy windows)
after i successfully use it under windows i start searching for how to make it work with linux

and i was surprised that ubuntu has the driver for it

this is what i did to make my 3G USB modem (Huawei E220)

1- sudo apt-get install wvdial gnome-ppp
to install wvdial, a PPP dial-in command line software, and a GNOME frontend to it

2- wvdialconf
Editing `/etc/wvdial.conf'.

Scanning your serial ports for a modem.

Modem Port Scan<*1>: S0 S1 S2 S3
WvModem<*1>: Cannot get information for serial port.
ttyUSB0<*1>: ATQ0 V1 E1 -- OK
ttyUSB0<*1>: ATQ0 V1 E1 Z -- OK
ttyUSB0<*1>: ATQ0 V1 E1 S0=0 -- OK
ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK
ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
ttyUSB0<*1>: Modem Identifier: ATI -- Manufacturer: huawei
ttyUSB0<*1>: Speed 9600: AT -- OK
ttyUSB0<*1>: Max speed is 9600; that should be safe.
ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
WvModem<*1>: Cannot get information for serial port.
ttyUSB1<*1>: ATQ0 V1 E1 -- OK
ttyUSB1<*1>: ATQ0 V1 E1 Z -- OK
ttyUSB1<*1>: ATQ0 V1 E1 S0=0 -- OK
ttyUSB1<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK
ttyUSB1<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK
ttyUSB1<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK
ttyUSB1<*1>: Modem Identifier: ATI -- Manufacturer: huawei
ttyUSB1<*1>: Speed 9600: AT -- OK
ttyUSB1<*1>: Max speed is 9600; that should be safe.
ttyUSB1<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK

Found a modem on /dev/ttyUSB0.
Modem configuration written to /etc/wvdial.conf.
/etc/wvdial.conf: Can't write '/etc/wvdial.conf.tmp13605': Permission denied
/etc/wvdial.conf: Can't write '/etc/wvdial.conf' ('/etc/wvdial.conf'): Bad file descriptor
ttyUSB0: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"
ttyUSB1: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0"

it cannot write to /etc/wvdial, i should have been run it inside sudo

3- sudo vi /etc/wvdial.conf
[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 460800
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem
Phone = *99#
Username = username
Password = password
Stupid Mode = 1

i only changed the name of the modem

4- wvdial
--> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
--> Carrier detected. Starting PPP immediately.
--> Starting pppd at Sat Jun 21 21:52:03 2008
--> Warning: Could not modify /etc/ppp/pap-secrets: Permission denied
--> --> PAP (Password Authentication Protocol) may be flaky.
--> Warning: Could not modify /etc/ppp/chap-secrets: Permission denied
--> --> CHAP (Challenge Handshake) may be flaky.
--> Pid of pppd: 13733
--> Using interface ppp0
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> local IP address 10.70.34.143
--> pppd: h�[06][08] �[06][08]
--> remote IP address 10.64.64.64
--> pppd: h�[06][08] �[06][08]
--> primary DNS address 212.103.160.26
--> pppd: h�[06][08] �[06][08]
--> secondary DNS address 4.2.2.2
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> Connect time 0.5 minutes.
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> pppd: h�[06][08] �[06][08]
--> Disconnecting at Sat Jun 21 21:52:34 2008
--> The PPP daemon has died: A modem hung up the phone (exit code = 16)
--> man pppd explains pppd error codes in more detail.
--> Try again and look into /var/log/messages and the wvdial and pppd man pages for more information.
--> Auto Reconnect will be attempted in 5 seconds
--> Cannot open /dev/ttyUSB0: No such file or directory
--> Cannot open /dev/ttyUSB0: No such file or directory
--> Cannot open /dev/ttyUSB0: No such file or directory

and her it works and i can surf the internet

enjoy it and try it for different operators and tell me about your test