Voice SMS message is a text message read aloud by text to speech(TTS) technology. The content is written in a text message, transformed into a voice message, and sent to the recipients. Before you move on, please read this introduction article first: Introduction of Voice Message Service.
Bulk voice SMS messages are a bulk of voice messages sent to a large group of people in one second. In this way, the sender can reach a lot of people to convey the curated message.
Compared to bulk SMS messages, bulk voice SMS messages can just be a different form of the same content. If merchants want to send bulk voice messages, it will only cost them when the recipients actually picked up the phones, while SMS messages will cost them once they are sent out.
Voice messages can also be higher efficient than SMS messages. People may not read your SMS message, but you’ll know whether they pick up your phone or not. If they pick up, you will also know how long they listen to the voice message, thus having a clear understanding of the quality of your message content.