Key Takeaways

  • O2 partnered with Mavenir to test network-based audio adjustments for callers with hearing loss.
  • Nearly 90% of participants reported clearer calls and reduced listening fatigue.
  • The approach highlights how operators can use core network intelligence to improve accessibility services.

O2’s latest experiment draws attention because it shifts accessibility from the device to the network itself. Instead of relying on phone-side settings or third-party apps, the company tested real-time audio optimization directly within its infrastructure. The work, carried out with Mavenir, points to a growing trend among telecom operators that are rethinking how core networks can support more inclusive communication.

The trial took place in Reading on June 11, 2026, and asked participants with hearing loss to complete a short automated assessment. That test measured how they perceive various sound frequencies. The resulting audio profile was then linked to each participant’s mobile number, allowing the network to modify call audio dynamically. The shift is notable because participants used their existing phones and numbers without changing anything about their day-to-day call habits.

Accessibility features embedded at the device level often go unused or require extra steps that some customers do not always feel comfortable navigating. A network-layer approach avoids that friction. One profoundly deaf participant described the difference as striking, noting clear hearing without hearing aids and no need to ask callers to repeat themselves.

Analysts have tracked interest in personalized audio and adaptive communication tools for several years. Reports from groups such as Gartner and Forrester point to carrier-level services as a promising area for differentiation, as they can apply intelligence across user segments without requiring users to manage new settings on their devices. This ties to a broader move among operators to explore cloud-native techniques that support real-time adjustments. The collaboration with Mavenir, known for telco-first cloud-native software, fits into that trend.

Usability across devices and interfaces remains a critical component of rolling out these services. Many users rely on email to receive instructions or updates about network trials, and a large share of email opens happen on mobile devices. Research from Litmus indicates that roughly 46% of email opens occur on phones, meaning browser-view links or fallback formats matter when distributing information about accessibility programs. For initiatives like O2’s trial, the communication channels directly influence awareness and participation.

During the trial, audio adjustments acted silently in the background. O2 reported that conversations sounded more natural to participants, and cognitive effort dropped. Almost 90% of participants reported improvements, suggesting the concept holds promise for broader application. When audio is tuned to the listener’s actual hearing profile, clarity improves and misunderstandings decline.

Telecom strategists are evaluating whether solutions like this can scale efficiently across millions of users. Network optimization requires processing resources and clear data governance practices. Yet operators have already taken steps toward more intelligent routing and quality management. Deloitte has described increasing interest in data-driven service personalization, showing why O2’s pilot aligns with the broader industry trajectory.

People with hearing loss often report that phone calls require intense concentration due to device microphones, background noise, and speech variability. By personalizing how speech frequencies are shaped and delivered, O2 and Mavenir attempted to reduce these friction points. This approach actively filters and enhances specific acoustic ranges rather than simply amplifying overall volume.

The Director of Core Networks at Virgin Media O2 described the goal as improving call experiences without placing new burdens on customers. Mavenir representatives emphasized how core networks can serve as an innovation platform, a concept telecom analysts have echoed for years.

Telecom operators continue to evaluate where customer experience can be improved without hardware upgrades. Because many users keep their phones for longer periods than they did a decade ago, operators are placing greater emphasis on software improvements that run at the network layer. O2’s experiment illustrates what that strategy looks like in practice.

This trial may set expectations for other operators considering similar accessibility initiatives. If adaptive audio can be tuned automatically and linked to a mobile number, further enhancements are possible. Future questions include whether profiles will adapt over time based on usage patterns or if users will be able to modify their hearing profiles later.

O2 and Mavenir tested an approach aimed at making phone conversations easier for people with hearing loss, and early results suggest it aids accessibility. While the telecom sector often focuses on speed, latency, or new spectrum, this trial demonstrates that adjusting core network intelligence can meaningfully improve how people communicate.