[hamiltonkibbe]

>the baseband can control everything Why would that be the case? Baseband in this case refers to a frequency, eg taking data(audio, SMS, etc) and mod/demodulating it. It should take raw data at the bottom of the OSI model and prep it for the RF front end, and vice versa. I may absolutely be wrong, but it doesn't have any connection to the microphone other than receiving preprocessed digital audio from the application processor. Look at the interface for an e.g TI cc2500, that's the sort of device that's being discussed

[mikeash]

"Baseband" in this case refers to a dedicated CPU and software that handles all of the high-level cellular radio protocol work. It's where the logic would be implemented to handle the data coming from a chip like the cc2500.