I just try to develope an application that send and reveice SMS throught the COM Port that is connected to a nokia phone ! (ok nothing speacial I thought)
I just connect to my nokia 6600 by hyperterm over Irda. When I enter AT i've got the answer OK. Unfortunatly no other AT command (like the needed AT+CNMI) workes. I always got back ERROR from the phone. It looks like only simple AT Commands (like ATD or ATI workes !).
There is limited number of AT commands implemented in Symbian OS based phones. Commands like AT+CNMI is one of the ones that are not being implemented. This is due the fact that OS will receive all incoming messages and will store it to the internal database and forwarding to AT command interface is possible.