I want to configure my nokia6630 mobile as EDGE modem. please someone tell me the process?

I found a process on another from that is:
.................................................. ..........
1) Create a file called "wvdial.conf" in /etc/ with a plain text editor (gedit did the job for me) with the following content:
Code:
{
[Dialer Defaults]
Modem = /dev/ttyUSB0
Baud = 460800
Init1 = ATZ
Init2 = AT+CGDCONT=1,"IP","internet.wind",,0,0
ISDN = 0
Modem Type = Analog Modem
Carrier Check = no
Phone = *99#
Username = ''
Password = ''
}

In the Init2 string change "internet.wind" to the access point string of your mobile operator.
2) Remember to configure your mobile for GPRS/UMTS services (follow their instructions) and to activate the service itself.
3) If you have connected in the past to ADSL from your Pegasos using Linux remember to do following:
a) open the Terminal;
b) type "network-admin" and give your root password when asked;
c) disable ethernet connection or you won't be able to go online using your mobile as a modem;
4) open the Terminal and type:
Code:
wvdial
Now you should be online.
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but can creat the file; but when i enter the wvdial in terminal then i got the following error:
[root@localhost ~]# wvdial
--> WvDial: Internet dialer version 1.54.0
--> 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
[root@localhost ~]#

please somebody help me, because I think when I can use the net, then linux will be more easy for me, like software install.
(in windows i've been using 6630 as modem with usb cable)

your 6630 may not be under /dev/ttyUSB0

What distro are you using? On Fedora 6, my usb devices usually appear as what they are. for example, my pendrive appears as sda0, while my joystick is jsk0

Your phone may appear as a phone (I have no idea what letters that would be) or a modem, or a harddrive.... When you find out what it is, (another user may provide a better way of doing it, but i look through /dev/ while pluging/unpluging the device to see if anythign changes. Another way would be to look at the Hardware list. In Gnome, go to System, Administration, Hardware to see if it turns up) then you can replace /dev/ttyUSB0 with whatever you find it to be.

Unfortunately, it may be more difficult than that... you may need to install software on your machine to allow your phone to recognise it as a computer. Hopefully not though, I'm not familliar with nokia usb stuff.

Would it not be easier (and cheaper) to get a dedicated modem....?