I want to implement something like this serial communication over an Audio Jack.
http://biobug.org/index.php/2010/02/19/lotd-clean-your-cell-phone/
He has used a Motorola phone.
Any other phone(Nokia or any other company) I can do this on ? Which can take TTL inputs on Audio jack?.(This is what I need primarily)
What are options for phones with Serial Communication possible with AVR's and other uC's?
Amongst the latest phones S60 3rd edition onwards which ones can I send AT commands to easily with AVR's. Do all phones now have FBUS interface on the battery holder? Or is it accessible outside somehow?