Smart messaging is a proprietary service developed by Nokia used for the sending and receiving of various digital media via SMS.
The typical size of an Operator Logo is 72x14 pixels, which is sent as two separate SMS messages.
Operator Logos sit in the middle of the screen and disappear when coverage is lost.
There is a workaround that allows a standard size Operator Logo to be sent as a single message, however, compatibility with newer or non-Nokia phones is uncertain.
The two most common Information Elements are for Port Number Addressing (code 05) and concatenation (code 00) (telling the phone how to put together two or more SMS messages to make a single message).
This means: The data content varies depending on the type of smart message.