Voice OTP for Reliable Verification
When an SMS does not arrive, an automated call reads the code out instead. Same API, works on feature phones, and reaches numbers where SMS delivery is weak.
Your personal support executive.
Based on 1000+ feedbacks
When The SMS Does Not Arrive, The Phone Rings
Some percentage of your OTP messages will always fail: a weak signal, an overloaded operator, a full inbox, a handset that filters unknown senders. Every one of those is an abandoned signup or a failed payment. A voice call closes that gap.
The same API you already use for SMS OTP takes one extra endpoint. Trigger the call after your SMS timeout, and the customer hears the code read out twice in the language they use. It works on the oldest feature phone in the market and needs no data connection at all.
Service Capabilities
Built as a production verification channel, not an add-on
One Call, One Code
Trigger a spoken OTP with the same shape of request you already use
GET https://api.dvconnect.in/v1/voice/otp
?apikey=YOUR_API_KEY
&mobile=9810000000
&otp=482913
&lang=hi
Response
{
"status": "queued",
"call_id": "c71ba4",
"credits_left": 4820
}
Voice OTP Plans
Charged per connected call. Buy in volume and the unit price drops.
All prices are exclusive of 18% GST. Credits are added to your account within minutes of payment and never expire.
Where Voice OTP Earns Its Keep
The situations where a spoken code beats a text message
Weak SMS Coverage
Rural and semi-urban circles where text delivery is unreliable.
Older Customers
A spoken code is easier than locating a message in a full inbox.
Feature Phones
No app, no data plan, no smartphone assumptions.
Checkout Rescue
Recover a payment about to be abandoned at the OTP step.
What Our Clients Say
Feedback from fintech, lending and marketplace teams
We added the voice fallback after a sixty second timeout and our completed-verification rate moved up several points immediately.
A large share of our users are on feature phones. Voice OTP is not a nice-to-have for us, it is the primary channel.
Integration was genuinely one endpoint. It took less time than the meeting where we decided to do it.
Hindi playback made a real difference with our customer base. Support calls about "OTP nahi aaya" dropped off.
Frequently Asked Questions
How voice OTP works, languages, DND, charging and fallbacks
You call the API with the mobile number and the code. Our system places an automated call and reads the digits out clearly, twice, so the customer can note them down. No app, no data connection and no smartphone required.
Use it as a fallback when the SMS has not been read within thirty to sixty seconds, for customers on feature phones, in areas with weak SMS delivery, and for older users who find a spoken code easier than finding a message.
Digits can be read in English, Hindi and major regional languages. You pass a language parameter with the request, so the same integration serves customers in whichever language they prefer.
Yes. Verification calls are transactional in nature and are placed to DND registered numbers as permitted, because the customer has requested the code.
No. Voice OTP is not covered by the DLT SMS framework, so you can start immediately without registering an entity, header or template.
Per connected call, in 30 second pulses. A typical OTP call finishes well inside one pulse. Unanswered and rejected calls are not deducted.
The system retries according to the retry count you set, and reports the final status back to your webhook so your application can fall back to another channel.
Yes, and most customers do. Send the SMS first, and if the code is not entered within your chosen timeout, trigger the voice call from the same flow.
Calls are typically placed within a couple of seconds of the API request. Connection time after that depends on the receiving operator and handset.
No. Voice OTP credits stay in your account until they are used.
Stop Losing Signups At The OTP Step
Add a voice fallback to your existing flow and recover the verifications SMS misses.