Hi,
I am currently building a similar project to this one. The problem I am having is with the interface from the phone (FBUS) to the PIC. Can you please explain how exactly the interface from the Nokia's FBUS to the Rx and Tx connectors on the PIC works.
Why have you used a pair of transistors on the Tx output from the phone, and why is the input to Rx going via a voltage divider because looking at **broken link removed** project which is doing the same thing, they have just plugged it in directly to the phone, through a 1k resistor.
Also presumably you are using USART in the PIC to communicate with the phone?
Thanks