Hi @alone --

I haven't tried personally, but the following websites may be useful:
=> http://www.xs4all.nl/~ernstagn/GPRS-HOWTO/
=> http://mcfrisk.kapsi.fi/linux_gprs.html

There must be a kernel module available it seems; does the following give =y or =m?
gzip -cdf /proc/config.gz | grep PPP

If so, it means the kernel has dial-up support; it should do. My custom kernel doesn't because I have wi-fi everywhere!

Next, please go to the terminal, plug the phone in and use the following command to see hat the kernel says when it's plugged in. It'll save it to a file, krnel_ppp.txt; please upload that to PasteBin or similar and link to it here.

dmesg | tail -n 25 > kernel_ppp.txt
lsmod >> kernel_ppp.txt

I'm afraid I can't help you further as I don't connect my phone this way; hopefully someone with more experience will be able to help!

Good luck!

Thanx you! SeaWolf!!! I will try!