SOHO Organizer requires the device named 'Serial Port' in order to communicate with your mobile phone for sending and receiving SMS messages, dialing phone numbers, and receiving caller ID information. Each phone manufacturer determines which device services a phone will support via Bluetooth. Some of these device services include:
Hands-Free voice gateway
OBEX Object Push
Dial-up networking gateway
To see which device services your phone supports open the Bluetooth system preferences and click the 'Devices' tab. Select your Bluetooth phone in the list and in the information pane for your phone it will list the Device Services your phone supports. If Serial Port is not listed then your phone will not work with SOHO Organizer.