How is a Dingtone message different from a SMS?
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 140 characters. They are not an example of real-time communication. Additionally, SMS messaging can become 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. They are more versatile, too: for example, you can see your friend typing a reply. Dingtone messages are also completely free of charge.