Mac OS X 10.3 or later: About faxing via mobile phone or Bluetooth
You might be able to send or receive faxes via Bluetooth or a mobile phone and Mac OS X 10.3 Panther or later.
However, the fax feature has not been tested over Bluetooth or with a mobile phone. This means that AppleCare does not offer telephone technical support for faxing via a third-party Bluetooth modem or mobile phone.