SMS messages are the traditional messaging system that carriers use to transmit across the cell phone network. SMS messages are text only and are limited to certain amount of characters. They are not an example of real-time communication. Additionally, regular SMS messaging is expensive.
On the other hand, Dingtone messages leverage the advantages of mobile Internet. They are real-time and interactive. They can also deliver multimedia messages like voice, video, images, doodle or even a location. They are more versatile, too: for example, you’ll know when your contact is typing. Dingtone messages are also completely free of charge.