During holidays I found another usage for my current phone (SonyEricsson k750i). It is Bluetooth Remote Control functionality.
Basically it turn phone into HID device but the good thing is that user can create own profile for this. There is a tool for it (Microsoft Windows executable) and also those files can be created by hand (instructions are provided by Stefan ‘tommie’ Tomanek as part of his excellent guide about using this cellphone with Linux).
I do not know does it is possible on Neo1973 (IIRC BlueZ only has HID daemon) but I will miss it if it is not…