Google and Airtel Deploy Carrier-Level Spam Filtering for RCS in India

Google and Bharti Airtel announced a partnership today to integrate carrier-level spam filtering directly into Rich Communication Services (RCS) messaging in India, creating what the companies describe as the first telecom-grade security layer for an over-the-top messaging platform.

The collaboration addresses a problem that has plagued RCS since its Indian rollout: according to TechCrunch, spam complaints in 2022 forced Google to temporarily halt all business promotions on the platform. Despite that pause, users continue reporting unwanted messages, undermining adoption of the technology Google has positioned as the SMS successor. Airtel operates infrastructure that has blocked 71 billion spam calls and 2.9 billion spam SMS messages over the past 18 months, achieving a 68.7% reduction in financial losses on its network.

Why India’s Spam Problem Matters

India represents both Google’s largest user market and its most challenging spam environment. According to data cited by Mobile Ecosystem Forum, Indian mobile users face an average of 17 spam calls per month and 76% report receiving at least three spam SMS daily. The country’s combination of massive mobile penetration, rapid digital payment growth, and aggressive enterprise marketing creates persistent incentive for bad actors.

RCS usage has grown globally, with Infobip projecting active users will reach 3.8 billion by the end of 2026 following Apple’s late-2024 iOS 18 integration. But India’s 700 million smartphone users and over 853 million WhatsApp accounts underscore the competitive pressure Google faces. Without credible spam controls, RCS cannot displace entrenched alternatives.

How the Integration Works

The system combines Airtel’s network intelligence with Google’s existing RCS platform to enable five real-time security measures. Business senders undergo telco-backed identity verification before messages route. The platform enforces Do Not Disturb preferences at the carrier level, categorizing promotional versus transactional traffic. Spam business messages are blocked pre-delivery, and malicious domains are filtered through multi-layered threat detection. Messages from senders flagged by AI systems deployed by both Airtel and Google are throttled.

Unlike application-layer filters that operate after network delivery, carrier-level filtering intercepts traffic before it reaches devices. This architecture mirrors traditional Telecom safeguards for voice and SMS but extends them to IP-based messaging. According to Airtel’s official release, the integration represents a world-first for applying telecom service provider verification standards to an OTT platform.

Commercial and Strategic Implications

The partnership establishes a template for carrier-platform collaboration that Google explicitly intends to replicate. Sameer Samat, President of Android Ecosystem at Google, stated the company is committed to working with carriers globally to standardize messaging security. That signals potential deals with operators in other high-spam markets, particularly across Asia and Latin America where RCS adoption is accelerating.

For carriers, RCS represents both threat and opportunity. While over-the-top apps like WhatsApp capture messaging revenue, RCS preserves operator control of the infrastructure layer. According to Mordor Intelligence, the RCS market is projected to grow from $3.59 billion in 2026 to $10.93 billion by 2031, at a 24.95% CAGR. Application-to-person campaigns deliver 6.2 times the ROI of basic SMS, creating enterprise demand carriers can monetize if they solve the spam problem.

India’s telecom regulator TRAI has tightened spam rules across SMS, calls, RCS, and WhatsApp, increasing pressure on all platforms to demonstrate effective controls. Airtel’s executive vice chairman Gopal Vittal explicitly called on other OTT platforms to adopt similar collaborative models, framing the issue as an industry-wide imperative.

What to Watch

Execution risk centers on whether real-time filtering degrades user experience through false positives or latency. Carriers guard filtering algorithms to prevent evasion, but TechCrunch notes neither company provided estimates for spam reduction targets or comparative benchmarks against other markets.

Broader adoption depends on whether competing Indian carriers Reliance Jio and Vodafone Idea follow suit. Jio holds the largest subscriber base at 489 million as of December 2025, and its participation would be necessary for ecosystem-wide impact. Google’s willingness to cede platform control to carrier filtering in exchange for spam mitigation sets a precedent that could reshape power dynamics in other markets where regulators demand accountability for messaging abuse.

The model’s portability to markets with different regulatory and competitive structures remains unclear. China’s three state carriers deployed RCS independently under the 5G Messaging brand without Google infrastructure. European and North American markets face lower absolute spam volumes but higher privacy expectations, potentially complicating deep carrier integration into content filtering.