What is a character, and what is a message block? What do they have to do with the messages I receive or send?
A character is any letter, number, punctuation mark, special symbol (@, $, %, etc.), or space. A message block is any set of characters sent in a single transmission from one (1) to 100 characters*. You can be charged for several message blocks with each message transmission. For example: 240 characters is the maximum receivable transmission length for 1Way text (alphanumeric) units, so a single transmission of 240 characters would count as three (3) message blocks: two (2) 100-character blocks, plus one (1) additional block for the other 40 characters. For advanced messaging units, each transmission sent or received can be up to 500 characters, so a single 500-character transmission would count as five (5) 100-character message blocks. Characters and message blocks do not apply to numeric units. *SkyWord Plus message blocks are a maximum of 10 characters each.