Did you see the documentation site? There's a pageon 3G dial-up modem use:
=> http://doc.slitaz.org/en:guides:dialup

It tells of a utility (tazhw setup 3g-modem) available by the 'Hardware Detection And Drivers' item in the System Tools menu, and clicking the "3G Modem" button.

I personally can't help further as I haven't used any kind of dial-up since the turn of the century.

Good luck!

Btw, it's SliTaz, not Slatiz!

Hi,

Thanks for the feedback. I am trying but it is not working. ttyUSB is not getting created after the suggested steps. Hence the gnome dialer is not working

its hard to help with this little info - which modem are you using?

Its not the same, but I have no problem with 2.5G (EDGE) modem in my mobile.

Install wvdial:

tazpkg get-install wvdial

This is my only connection, I download packages and its dependencies manually from pkgs.slitaz.org, then install them.

Plug in the modem (I plug in my mobile phone to USB).
Load kernel module:

modprobe cdc_acm

Configure /etc/wvdial.conf .
I just to know, you can use 'wvdialconf' command to create and auto-configure the /etc/wvdial.conf (this is not describe in wiki article!) Then you want edit conf to insert your pin, APN, username, password and dialing number.

And now, dialing and getting the net:

wvdial

It should work, you need to use another internet connection to get wvdial and use /etc/wvdial.conf to input your specific info. This is what works for me with Vodafone:

[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 7200000
Init1 =
Init2 = ATZ
Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Carrier Check = no
Dial Command = ATX1DT
Phone = *99***1#
Username = ppp
Password = ppp
Stupid Mode = yes
Auto Reconnect = yes
Init5 = AT+CGDCONT=1,"IP","internet.vodafone.ro"

Also, there is a hardware control panel (I'm not in Slitaz right now so I don't remember the name but it has a button to load necessary modules) which I believe loaded the 'option' module for my modem.
It works, just have to be persistent and wvdial is your friend regarding 3G :)