Dingtone allows its users to send unlimited messages for free. As you make a phone call through Dingtone, you can get a real U.S. phone number which can be used to send texts to – and receive texts from anyone whether they use Dingtone or not.
Don't forget to invite your friends to Dingtone so that you can send unlimited messages completely free of charge.
You can start to send your message by tapping the “Messages” at the navigation bar at the bottom of the interface. Tap the “pencil-like” icon to enter the message editing page where you should add your contact phone number by either directly selecting Dingtone user or filling the contact’s phone number.