Almost certainly (this is the case with all WM smartphones, of which this one looks like a close relative) the phone side will be just attached to the applications processor by a UART and get sent AT commands. Audio is generally done as a separate I2S bus.

This way the call side can remain closed - changes to this code probably require re-approvals, for starters - but you can faff all you want with the interesting bits.

Hugo

Just updating this thread...

Slashdot reports today on the end of Trolltech's development of the Qtopia Greenphone.

Fear not, linux-phone lovers, their efforts are now focused on the Neo 1973.

Meanwhile, I'm waiting on the Motorola RIZR Z6c...

That looks like a silly phone, like the Trekstor music player it has a daft form factor. Why would I want those rounded ends ? They just aren't an efficient use of pocket space