about messages

SMS: short messge service,SMS enables a user to send short messages between a GSM mobile station and a Short Message Entity via a Service Center.

EMS:enhanced messaging service

MMS:multimedia messaging sevice

Smart Messaging:    Smart Messaging is in fact basically a special type of Text Message,with its own prefixes and codes,that makes it possible for the phone to recognize the m essage as--instead of a text message to the attention of the user--a "functional" message that should be treated as:a ringtone,a screen logo,in some cases even a business card or group graphics that can be used to identify who is calling.