What is Voice SMS?

An automated phone call that delivers a pre-recorded or text-to-speech message to a recipient's mobile or landline, used as an SMS delivery fallback or standalone alert.

Voice SMS (also called Voice OTP or automated voice call) is an alternative messaging channel where the message content is spoken aloud to the recipient via an automated phone call rather than delivered as a text. It is primarily used as a fallback when standard SMS delivery fails—for example, when a subscriber has limited SMS reception, is on a voice-only plan, or when the business wants to reach landline numbers. Voice SMS is also used independently in sectors like banking for OTP delivery to elderly users or in regional markets where voice is more accessible than text. The message can be pre-recorded or generated using text-to-speech (TTS) technology in multiple languages. BhashSMS supports voice OTP as part of its multi-channel delivery stack.