Can I concatenate messages myself?

Our system will automatically and efficiently split up long messages for you. It is not possible for you to do this manually due to the complexities of all the different message types and coding schemes and the difficulties associated with generating the necessary concatenation headers for each part of the message.

For more information on sending concatenated SMS messages please see the article on Sending Long Or Concatenated Messages and also Concatenated And Long SMS for a more full description of how long SMS are split up.