Voice SMS seems like Old wine in New bottle. Voice SMS Services launched by various companies are almost similar to voice mail, just that the packaging if different.

The voice message from the user is recorded via the normal calling handling mechanism, and an alert is provided to the recipient. The recipient is gets a playback of the message when he responds to the alert. Sounds very similar to voice mail.

Some providers use IVR to handle the user interface for voice SMS. Some use USSD infra to handle the user interface. SMS also can be used. BSNL calcutta is using IVR. Most of the other providers are using USSD.

Voice SMS is useful when sending voice alerts to a group of people. Almost like a bulk call facility on your mobile. Check out our bulk call service at www.fastalerts.in