I use bluetooth to connect my mobile to PC. Since other means of communication too outdated (IR and serial) I pay attention only to bluetooth.

I found Affix bluetooth stack more sutable for my mobile. This stack was design in Nokia Research Center. It is easier to install and more handy in use.

The information about communication between mobile phone and Affix you can find in Affix Bluetooth HOWTO. Most of the examples are against my Nokia 7650.

I use Nokia 7650 as a GPRS modem. First I create connection to my mobile through bluetooth as described in Affix Bluetooth HOWTO.

Then I get device /dev/btyx which I can use like a /dev/ttySx connected to modem.

Here we go to ppp connection to provider. Establishing PPP connection is described in GPRS PPP setting for Nokia mobiles (tested in Finnish Sonera & Radilinja networks) .

If you are lucky like me having Symbian mobile phone (7650/3650 etc) you can control applications on your linux workstation by mobile phone with bemused symbian application installed. In the example below I control xmms mp3 player.

The procedure of compiling and installing bemused server for linux is described in Bemused with Affix bluetooth stack.