Your app or platform triggers a verification request.
VOICE OTP
Voice-based OTP fallback for secure authentication.
Manor Voice OTP helps businesses verify users when SMS is delayed, blocked or unavailable — using call-based authentication as a practical fallback for critical customer journeys.
2FAsecure authentication support
SMSfallback when text fails
Voicecall-based OTP delivery
APIworkflow-ready integration
SMS TO VOICE FALLBACK
Keep verification moving when SMS cannot complete.
Customers may fail to receive SMS codes because of roaming issues, network filtering, handset problems or regional delivery delays. Voice OTP gives them a second secure path to complete authentication.
SMS OTPRetry logicVoice callVerified
SMS OTP is delivered where normal text delivery is working.
A voice call reads the OTP when SMS is unavailable or delayed.
The customer completes authentication with reduced drop-off.
AUTHENTICATION BENEFITS
Designed for secure, practical user verification.
Voice OTP supports two-factor authentication, account protection and service continuity where a single SMS-only verification path is not enough.
SMS fallback verification
Give users a reliable alternative when SMS OTP is delayed, blocked, filtered or unavailable.
Stronger account protection
Add an extra authentication layer for login, payments, account recovery and high-risk actions.
Global reach by voice
Deliver OTP codes through outbound calls for users who cannot receive text messages.
Better completion rates
Reduce failed verification journeys by offering customers more than one authentication channel.
DELIVERY CONTROLS
Control the full verification journey.
Voice OTP performs best when retry logic, route choice, reporting and fraud-aware controls are designed together. Manor helps structure SMS and voice fallback as one dependable authentication flow.
SMS attemptRetry ruleVoice OTPVerified
VOICE OTP CONTROLSVerification ready
ActiveRetry logicConfigurable
Channel designSMS + Voice
VisibilityDashboard ready
Send the first OTP through the standard SMS channel.
Detect delay, failure or unavailable message delivery.
Read the OTP securely through a call-based fallback.
Give the user a second path to finish authentication.
✓Configurable retry attempts
✓Domestic and international voice delivery
✓Multilingual voice workflow support
✓Dashboard reporting and delivery visibility
✓Fraud-aware verification process
✓SMS + voice channel design
READY TO CONNECT?
Add Voice OTP fallback to your verification journey
Speak with Manor about SMS OTP, voice fallback, retry design, route coverage and secure authentication workflows for your business.