Flash call

Trusted by over 5,000 companies

Why Your Business Needs Flash Call Verification

3x lower costs

Flash calls are three times cheaper than SMS OTPs, making them a highly cost-effective and reliable alternative for user verification.

Optimize the verification process

Simplify and speed up user authentication by automating the verification process with flash calls, achieving operational efficiency.

Reduce verification delays

No more long waits and undelivered SMS OTPs. Keep your users engaged by achieving near-instant verification times.

Maximize security

Prevent fraud and unauthorized activity with real-time call-based verification that confirms user ownership of phone numbers instantly.

Improve user experience

Deliver a smooth, hassle-free onboarding and authentication experience to your customers so you can win their trust and satisfaction.

What our clients say

DecisionTelecom’s platform helped us at MediaHub significantly improve our customer communication. Before DecisionTelecom, customer used to be served manually, but now these processes are more automated, economically efficient, and user-friendly. Now our customers have a seamless customer journey, and at the same time we have cut our costs by about 40%.

Roman Peresunko, Head of advertising agency "MediaHub"

DecisionTelecom's Viber for Business and Chat Inbox function provided us the possibility to contact our customers online and offer them more purchase options with direct links and exclusive offers. As a result, we have increased the number of our customers and the sales of monthly gym membership by 185 percent this year.

Irina, marketing director of "Geliar Gym"

Customers

CHANNELS

The fastest way to verify your users

Make user verification simple, secure, and scalable with flash calls.

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How businesses use flash calling

Simplify critical verification tasks with speed and precision without compromising on security and UX, all at a 3x lower cost than SMS OTPs.

Two-factor authentication

Authenticate phone numbers quickly to onboard or log in users seamlessly.

Transaction approvals

Verify sensitive actions, such as payments or password resets, within second.

Reactivation

Ensure verified and legitimate reactivation of dormant or inactive accounts.

Number validation

Achieve better user data accuracy while eliminating manual verification processes.

What You Get with DecisionTelecom’s Flash Call Service

Speed

Conduct immediate phone number verification, slashing wait times and reducing drop-offs during the signup process.

Cost-efficiency

Save verification costs by up to three times compared to SMS OTPs while maintaining high accuracy and reliability.

Easy integration

Our flash call API seamlessly integrates into your current workflows, ensuring a hassle-free setup without additional resources.

Scalability

Whether you’re a startup or an enterprise, our solution adapts to your growing verification needs with ease.

High success rates

Bypass common issues like network instability and overflowing inboxes to achieve a higher successful verification rate.

Real-time reporting

Track every verification attempt with detailed live reports to optimize processes and improve operational efficiency.

Flexible Pricing & Volume Discounts

Get the best rates for SMS, RCS, Viber, and WhatsApp Business Messages with our flexible, pay-as-you-go model. Save more with volume-based discounts when sending 100,000+ messages per month. Our team ensures the most efficient delivery routes for your business messaging and voice calls.

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Who are our Clients?

Sense Bank & DecisionTelecom: Strategic Messaging Partnership for Banking Excellence

Verify API

SMS API

Sense Bank & DecisionTelecom: Strategic Messaging Partnership for Banking

JSC Sense Bank is a leading Ukrainian financial institution offering a full spectrum of banking services to individual and corporate clients. SMS notifications are a key communication channel between the bank and its customers, enabling fast, secure, and real-time updates. These messages allow users to monitor financial transactions, receive one-time passwo

SMS

Ukrainian Railways and Decision Telecom: Partnership Builds Trust and Prov

JSC “Ukrainian Railways” provides convenient and affordable transportation services, ensuring connectivity between all regions through an extensive network of routes. The company strives to offer passengers reliable and comfortable journeys, contributing to the development of infrastructure and enhancing the mobility of the nation.

UKREXIMBANK and DecisionTelecom built reliable SMS and Viber business messaging for secured Bank communications

Viber for Business

SMS

UKREXIMBANK and DecisionTelecom built reliable SMS and Viber business mess

JSC"The State Export-Import Bank of Ukraine" (Ukreximbank) www.eximb.com, one of the largest state-owned banks in Ukraine, provides a wide range of financial services to both corporate clients and individuals. Actively supporting foreign economic activity, the bank offers loans and guarantees for exporters and importers, helping to optimize international fin

Verify SMS API

Customer Case: NeoPay

NeoPay leads the market in delivering compliance solutions to electronic money issuers and payment institutions. They ensure the smooth operation of financial transactions and regulatory compliance, providing their clients with secure and efficient financial services.

Viber chat sessions

DecisionTelecom and IT-STEP University: Viber Business Messaging for Smart

IT-STEP University is the first licensed higher IT education institution in Ukraine. Our students are trained in fields such as programming, graphic design, networks, and cybersecurity.

All Clients

Frequently Asked Questions

How much does phone call verification cost?

The cost of phone call verification depends on factors such as call volume and geographic location. DecisionTelecom offers competitive pricing with discounts available for high-volume needs. You can achieve up to a threefold reduction in costs if you decide to switch from SMS verification to flash calls.

Is flash call verification legal to use worldwide?

Local telecommunication regulations can vary regarding flash call verification. DecisionTelecom ensures compliance with all relevant laws and standards in the regions where we operate. Our support team can guide you on best practices, but we highly encourage you to look into specific policies within your own target markets, too.

What makes flash calling faster than other verification methods?

Flash calling bypasses many typical communication issues, such as network congestion, full inboxes, or spam blocklists. Since the verification relies on an instant phone call, users can complete the process in seconds without having to provide any real input to the process.

Does call verification work internationally?

Yes, flash call verification works globally. DecisionTelecom’s solution is designed to deliver reliable results across international telecom networks.

How secure is flash call verification?

Flash call verification is highly secure because it directly validates the user’s phone number through the call itself, reducing the risk of interception or fraud. DecisionTelecom further ensures this process is executed over reliable telecom routes and architectures for maximum safety and accuracy.

The World’s Most Connected Cloud Communications Platform

With over 800 direct global telco connections across 190 countries, DecisionTelecom is the number one choice to globally scale your customer communications – over any channel.

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Flash Call Verification for Secure User Authentication