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 Since other means of communication too outdated (IR and serial) I pay attention only to bluetooth.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.