What is messmo ? messmo is a new TXT messaging application that lets you send both normal SMS as well as free TXT messages to messmo users. [ad#chi60] What do you mean send SMS ? If messmo sees that the recipient of your TXT message is not a messmo user it simply tells your handset to send the TXT message as a normal SMS. You pay your normal SMS cost. What if they are a messmo user ? Great question [...]