usually there is a "settings" menu in the messaging screen and you can make a signature but it usually has to fdo with the type of phone you have. Try looking at the starting book that you get with...
Something in a different language Like e in french mine is la vie est belle( life is beautiful) or you could have I love you In a different language =]
Some phones can't do it. But go to your inbox, and go to options, and it should say it somewhere. Or don't go to Inbox. go to where it shows inbox, and outbox, and drafts. and click options, and it...