Infobip Launches SIM-Based Number Verification to Help Operators Tackle OTP Fraud

Global AI-first cloud communications platform Infobip  launched its SIM-based Number Verification solution, helping telecom operators worldwide accelerate the adoption of SIM-based Number Verification through Network API aggregation and enterprise onboarding. The initiative helps mobile network operators (MNOs) create new authentication revenue opportunities while enabling enterprises to move beyond traditional OTP toward more secure, lower-friction authentication experiences.

As fraud, delivery challenges, cost pressure, and regulatory scrutiny continue reshaping the authentication landscape, operators and enterprises are increasingly looking for stronger authentication alternatives to one-time passwords (OTP). SIM-based Number Verification uses the SIM and mobile network as a trusted identity layer, enabling silent authentication without one-time passwords or manual code entry by proving actual possession of the second authentication factor — the mobile phone number.

By using the SIM as the trust anchor and cryptographically verified through the mobile network that the number belongs to the SIM in the device, the approach reduces fraud risk, improves user experience, and enables faster, more seamless authentication across both cellular and Wi-Fi environments. Unlike earlier network-based verification methods, it also supports more modern consent- and token-based flows while reducing dependence on mobile-data-only verification.

Infobip connects telecom operators with enterprise authentication demand through its Network API aggregation, helping MNOs commercialize SIM-based Number Verification while giving enterprises access to operator-grade authentication through a single integration. This enables operators to monetize authentication capabilities while helping enterprises adopt a more secure authentication method that offers a better customer experience than traditional one-time passwords.

“Operators already own one of the most trusted assets in digital identity — the SIM and the network authentication process. Our role is to help operators commercialize that capability faster while giving enterprises a scalable path toward more secure and seamless authentication.”

– Matija Ražem, Chief Commercial Telecom Officer, Infobip

“Authentication is becoming a much bigger part of the overall customer experience, not just a security checkpoint. SIM-based Number Verification creates an opportunity to reduce friction for users while strengthening trust in mobile authentication. By removing the need for one-time passwords and leveraging the trust already built into the SIM and mobile network, enterprises can deliver more seamless and secure digital experiences at scale.”

– Leonardo Silva, Head of B2B Messaging and Open Gateway, Vivo

Infobip already supports operators globally through messaging monetization, fraud prevention, CPaaS, Network APIs, and enterprise connectivity solutions. To learn more about SIM-based Number Verification and how it is helping operators and enterprises deliver more secure, seamless authentication experiences, read our latest blog here: https://www.infobip.com/blog/entitlement-servers-and-sim-based-number-verification