The present invention is directed to the use of concatenatable Point-To-MultiPoint (PTMP) broadcast messages for displaying display messages, and in particular long display messages requiring two or more PTMP broadcast messages, on personal cellular telecommunications devices. The present invention is achieved by the provision of a pseudo-header including a display message identifier, a PTMP broadcast message field for specifying the number P.gtoreq.1 of PTMP broadcast messages to transport an entire display message, and a PTMP broadcast message counter Q=(1, 2, . . . , P-1, P) for specifying the location of a PTMP broadcast message in that sequence. A pseudo-header may alternatively enable concatenation of two or more macromessages into a supermacromessage.

 
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