UMTS via Bluetooth

To use UMTS Internet via a bluetooth mobile phone, install the packages gnome-ppp and ppp.

There’s a nice manual at UbuntuUsers.

use hcitool scan to find the MAC of your mobile
use sdptool search DUN to find the dial-up networking details of your mobile, note the line Channel: 7
edit the file /etc/bluetooth/rfcomm.conf and uncomment the section and make the changes according to your details:
rfcomm0 {
# Automatically bind the device at startup
bind yes;

# Bluetooth address of the device
device 11:22:33:44:55:66;

# RFCOMM channel for the connection
channel 7;

# Description of the connection
comment "SonyEricsson P1i";
}
launch Gnome-PPP
click Setup and change the settings:
- Modem Tab
  - Device: /dev/rfcomm0
  - Type: USB-Modem
  - Speed: 460800
  - [X] Wait for dialtone
  - Init Strings
    - Init 2: ATE1 (ATZ is sent automatically by Gnome-PPP)
- Network Tab
  - Leave everything as it is
- Options Tab
  - [X] Ignore terminal strings (stupid mode)
enter following details for dialup:
- Username: t-mobile
- Password: tm
- Phone number: *99#