As you tap “Messages” >> “Pencil-like” icon, you’ll reach the message editing page. Dingtone provides flexible message sending methods: Group SMS and Broadcast Messages.
In the case of Group SMS, there should be first a chat group. As you send a message in this chat group, everyone will see it and talk about it together in this group. It’s more like a discussion within a certain range.
In the case of Broadcast SMS, however, you send an SMS to many recipients at the same time and they can only reply to you. It is suitable for sending the same message to a group of people and you don’t need to send it to them one by one. You send a message to a group and you receive a reply from individuals.