Caller Ring Back Tone (CRBT)
  • A Personal Touch to Every Ring — Elevate with Caller Ring Back Tones

    Comviva’s CRBT solution empowers telecom operators to deliver a dynamic, personalized service that drives customer satisfaction, loyalty, and revenue.

    Whether it’s a favorite song, an engaging video, or a thoughtful message — each call becomes an opportunity to express, connect, and engage.

    Intelligent Features for Credible Digital Experiences

    Personalized Tones

    Customize tones for every caller or group, schedule them by time, and manage with intuitive playlists. You’re in full control of your soundscape.

    Video Tones

    Add a visual edge to audio tones with immersive Video RBT, optimized for today’s 5G networks.

    Digital-First Experience

    Discover, set, and manage tones across web, apps, AI chatbots, smart devices — supported by AI-powered content recommendations and seamless social integrations.

    Reverse RBT & X2RBT

    Let users hear their own tones while calling out (RRBT), or create a dual experience with X2RBT — where expression meets self-reflection.

    Partner Management System

    Simplify content onboarding with a smart, online portal that enables real-time content availability for users.

    Scalable Architecture

    Microservices-based design ensures the platform scales effortlessly with network growth.

    Advanced Analytics

    Real-time dashboards offer data-driven insights for smarter decisions and continuous optimization.

    Built-in Security & Compliance

    Enterprise-grade security aligned with ISO 27001, GDPR, OWASP Top 10, and CIS best practices.

    Why Choose CRBT?

    Proven Leadership

    With over two decades of domain expertise, we bring deep regulatory and regional understanding to every deployment.


    Next-Gen Engagement

    From AI-led personalization to immersive Video RBT — deliver future-ready experiences today.


    Unmatched Scale & Reach

    One of the world’s largest CRBT platforms, serving 500M+ users and delivering over 2 billion tones daily.


    Flexible Deployments

    Support for VMs, bare metal, and cloud. On-prem tone players keep latency low and performance high.


    End-to-End Compliance

    Built to protect — from user data to monetization, with leading security standards.

    Frequently Asked Questions

    It is a service which allows users to opt for a personalized Tone – Music or anything, which plays to its callers during the call connect time whenever someone makes a call to the user. RBT replaces the default Tring-Tring, or any fixed Tone set by the network.

    Comviva RBT offers multiple setting options for the user not limited to all caller RBT, Special Caller RBT, Group RBT, Fixed Album, Personalized Album/Shuffle, Jukebox, Gift RBT, Conditional RBT (Time specific), Status RBT, Name Tone RBT, DIY RBT, Corporate RBT, Brand RBT, Reverse RBT, X2RBT, Search, Predictive search, Pre-RBT, Content Recommendations etc.

    RBT can be activated though multiple inbound channels like SMS, USSD, IVR, Web Portal, Digital SDK, Copy, Star 2 Copy, Chatbot etc. and outbound channels like OBD, SMS Push, Flash SMS, USSD Push, Digital Advertising etc.

    Yes, Comviva RBT comes preloaded with bunch of digital channels like custom Web portal, SDK for Android, iOS & Web Apps, chatbot interface on Web, WhatsApp, Telegram, Messenger & Telegram, Social Media integration with FB, Twitter, Instagram & mail.

    Comviva RBT supports multiple charging models as per the need of customer like Pack + Content Charging, Content only charging, Combo charging, Daily packs, weekly packs, monthly packs etc.

    Content preferences varies from market to market, and it is very difficult to carry a catalog for each market. Although Comviva has few existing relationships with content partners in Middle East & Africa, but we prefer Telcos bring the content as per the requirements & preferences of their users.

    Comviva is very flexible in supporting Telcos with various business models to make best out of RBT revenues. We offer our RBT suite in CapEx, MG+Rev Share or a pure Rev Share arrangement depending on Telco size and GTM.

    Comviva RBT is built on micro-services architecture which can support any technologies around the globe.

    Traditionally, RBT services are core to network and thus mostly deployed on premise to avoid latency. Our solution is cloud native, can be deployed on private cloud. We use Virtual Machines in our deployment to support multiple instances.

    Comviva RBT supports SIP/RTP based networks to play tones.

    Our service is developed using micro-service architecture which can scale to any extent of operations. We have already deployed the world’s largest RBT platform which is capable of 500mn+ subs.

    Comviva provides a dedicated team of technical experts to look after the service as per the agreement. Depending on mutual agreements, Comviva can also provide expert consultants to manage and grow RBT business.

    Comviva is responsible for providing RBT software, hardware, and its maintenance. Marketing, branding and promotions are generally done by the Telco but Comviva can always help in promotions provided necessary tools are provided by the Telco as per agreed terms.

    Comviva RBT platform is capable to handle Video RBT services with advanced Video supporting Codec as a part of standard solution. We have successfully tested Video RBT in two Telcos on a VoLTE call.

    Comviva RBT offer a comprehensive suite of features catering to modern customer needs with a strong backend in the form of digital service delivery platform which provides online partner management system, service creation environment, service definition, sandbox testing environment, flexible & customizable reporting module, online Recon engine, Recommendation engine and Fraud Management System. Moreover, we also provide dedicated resources for technical and business support.