This a basic question. I know midlets can be started by the Push Registry by SMS and MMS messages. SMS messages are directed to a midlet based on the user header (port) and MMS on the basis of the application-id. Using NowSMS, how/where do I specify the application-id for a MMS message. Is it the "from" part? Any help would be greatly appreciated. Does anybody know the max size (limit) of a MMS message or is it carrier/device specific?