SMS OTP
Widest reach, highest user familiarity worldwide, no app installation required
Routine login verification, general identity checks, fallback for other channels
Laaffic FlashCall
One ring. Verified.
FlashCall carries the code in a one-ring call that needs no answer — no SMS template, verified in under 5 seconds, at a lower cost.
Four Channels Compared — Pick by Need, Combine by Scenario
Channel
Core Strength
Best Fit Scenario
Voice OTP
Unaffected by SMS filtering or blocking, stable delivery, no SMS template registration needed
Markets with unstable SMS delivery or DND restrictions, high-security operations, backup channel for SMS OTP
Social & IM OTP
Up to 98% delivery rate, delivered in under 1 second, end-to-end encrypted, up to 50%-90% lower cost than SMS in some markets
High WhatsApp/Viber penetration markets (India, Brazil, Eastern Europe, Southeast Asia), registration and login flows that need fast verification
FlashCall
Completed in 5 seconds, 30%-70% lower cost than SMS, no template registration, auto-read by app
New user registration, login verification, payment confirmation, emerging-market acquisition
Replace SMS OTP with
a call your users never need to answer
Automatically hangs up,
no need to answer
no need to answer
Laaffic places an outbound call that rings for 1–3 seconds and disconnects automatically. The user never answers — and never has to do anything.
The number is the code
The last 4–6 digits of the calling number are the verification code for this session.
Auto-filled, zero effort
On Android, the app reads the call log, fills in the code, and completes verification automatically.
Why Choose Laaffic FlashCall
30%–70% lower cost
Billed per verification instead of per message — verification costs drop by 30%–70%.
Verified in under 5 seconds
Completed in under 5 seconds in most cases — less waiting, higher sign-up conversion.
Independent channel, unaffected
Runs on the voice channel, bypassing SMS filtering, congestion, and hijacking.
No registration, fast launch
Standard REST API, no template registration. Go live in as little as one day.
Where FlashCall Fits
used for any step that requires identity verification.
New User Registration
Number binding and sign-up verification after first install — a shorter path to conversion.
Login Verification
Replace SMS OTP at sign-in and cut failed login attempts.
Payment Confirmation
Identity checks before transactions, transfers, and order placement.
Password Recovery
Forgot-password and account-unlock flows that get users back in quickly.
High-Risk Actions
Step-up verification when changing phone numbers or payment details.
Emerging-Market Acquisition
Where SMS delivery is weak, the voice channel fills the gap and keeps acquisition steady.
Professional Assurance, Global Trust
20 years
Industry experience
2 billion+
Messages delivered monthly
5,000+
Global partners
200+
Countries and regions covered
ISO 27001 / 27701
Certified for privacy and information security
FlashCall-specific assurance
Local number resources across markets, Direct tier-one carrier connections, Local compliance filing support
Start Verifying with FlashCall
Want to assess feasibility and cost for your market? Talk to the Laaffic team.
