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Flash Call Verification

Missed Call Authentication

Instant customer verification at your fingertips

Introducing Flash Call Verification - the lightning-fast, budget-friendly way to verify users instantly. Experience seamless multi-factor authentication like never before.

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Trusted by more than 150,000 companies worldwide, including 80% of the world's leading technology enterprises

Enhance user experience while reducing costs without compromising security

Enhanced User Experience

Provide customers with seamless, straightforward authentication that's up to 70% faster than traditional SMS methods.

Increased Conversions

Retain more customers from the start. Create verification flows that meet modern expectations – swift and effortless!

Reduced Acquisition Costs

Get top-tier verification for less! Flash Call Verification reduces OTP costs by up to 25% compared to SMS verification.

Flash Call Demo

Experience how simple it is – try it yourself!

User experience is paramount! A missed call generates a one-time password, verifying users within seconds – even faster for Android users with zero interaction needed. Flash Call is also compatible with web application verification on desktops and laptops.

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"Zapptext has developed a service that's been invaluable to our business. Integration is straightforward, user experience is smooth, and the results are excellent."

Alan Mamedi

CEO & Founder, Truecaller

"Since implementing Zapptext's Flash Call verification, we've witnessed unprecedented success rates in verifications worldwide."

Ari Roisman

Co-Founder and CEO

Dependable backup and comprehensive analytics

Access all Zapptext verification solutions through our REST API and combine Flash Call Verification with other methods for reliable fallback, cost reduction, and improved conversion rates. Monitor performance with real-time, detailed analytics through our self-service portal.

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Flash Call Demo

Quick integration, immediate cost savings

Start using our verification product with our Verification SDK or integrate via our REST API or SDK for iOS, Android, and JavaScript with these simple steps:

  • Create your free account
  • Initiate a Flash Call Verification request
  • Submit verification with the received code
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A comprehensive solution for all verification requirements

Simple Integration

Implement verification quickly with minimal code using our lightweight SDK or REST API for Android.

Advanced Security

Access over 1,000,000 numbers for security equivalent to 6-digit OTP codes. Need enhanced security? Contact us!

Automated OTP Detection

Deliver frictionless experiences from day one. Flash Call Verification automatically detects one-time passwords without user input.

Route Optimization

Maximize conversion rates through real-time feedback – our reporting API continuously finds the most effective routes.

Smooth Experience

Offer hassle-free verification! Our Android SDK handles the entire on-device call verification process automatically.

Compliance Ready

ISO27001-certified solution, compliant with EU GDPR, featuring secure cryptographic code generation and storage.

Frequently Asked Questions

Zapptext Flash Call Verification enables phone number verification with minimal user interaction. It uses a missed call where the incoming number serves as the OTP code, similar to SMS. On Android devices, the code is processed automatically for seamless verification.

The process involves placing a call to the user's mobile phone followed by an authentication request to the provider's backend. Verification can occur automatically through the SDK without user awareness, or users can manually enter their phone number for verification.

Adding a second security layer beyond passwords helps protect against unauthorized account access. Requiring additional verification, like an OTP sent to a mobile phone, significantly enhances account security.

2FA combines something known with something possessed – typically a password plus a mobile phone. This additional security layer protects accounts by requiring a PIN sent via SMS to the registered phone, denying access if the code can't be provided.

While Flash Call Verification works best on Android, web and iOS users need to manually input the OTP. Due to iOS limitations affecting user experience, we primarily recommend this solution for Android and web applications.
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