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Recently I bought Huawei EC-121 modem from Omnnea (Iraqi CDMA operator) with monthly subscription , it works fine on Windows but when I plugged it in Ubuntu 8.10 NetworkManager didn’t detect anything….however, dmesg showed 3 modems detected by the kernel ttyUSB0…ttyUSB2…if it takes long time to detect the modems just try to rmmod usb-storage to ignore the embedded CD-Drive emulator.

Getting this thing to work under Linux wasn’t hard at all , prepare your wvdial configuration :

sudo gedit /etc/wvdial

replace the contents of the file with the fo

[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 M1 L1 X3 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
ISDN = 0
Abort On No Dialtone = False
New PPPD = yes
Phone = #777
Modem = /dev/ttyUSB0
Username = omnnea
Password = omnnea

Now try to connect using wvdial :

sudo wvdial

you will get something like this :

WvDial: Internet dialer version 1.60

Cannot get information for serial port.

Initializing modem.

Sending: ATX3

ATX3

OK

Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0

ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0

OK

Modem initialized.

Sending: ATM1L3DT#777

Waiting for carrier.

ATM1L3DT#777

CONNECT 153600

Carrier detected. Waiting for prompt.

~[7f]}#@!}!} } }=}!}$}%\}”}&} } } } }#}%B#}%}%}&.|&p}’}”}(}”qW~

PPP negotiation detected.

Starting pppd at Thu Dec 11 14:10:23 2008

Pid of pppd: 6515

Using interface ppp0

local IP address 10.10.6.148

remote IP address 192.168.2.2

primary DNS address 192.168.1.1

secondary DNS address 4.2.2.5

For some reason wvdial doesn’t change the DNS name servers so you have to do it manually :

sudo gedit /etc/resolv.conf

and add the following name servers :

nameserver 192.168.1.1

nameserver 4.2.2.5