Hong Kong's 2G Sunset: An AI-Powered Leap into a 5.5G Future

HONG KONG – June 23, 2026 – Today marks the end of a technological era in Hong Kong. China Mobile Hong Kong (CMHK) has officially ceased its second-generation (2G) mobile service, the last operator in the city to do so. While the shutdown of a network that first defined mobile connectivity decades ago is a nostalgic milestone, the real story isn't about what's ending, but what's beginning. This move completes Hong Kong's city-wide transition away from legacy networks and fires the starting gun on a more aggressive race towards a 5.5G, AI-driven future.

For business leaders, this is more than a technical footnote; it's a case study in strategic asset reallocation and operational transformation. By becoming the first local operator to offer services exclusively on 4G, 5G, and the nascent 5.5G networks, CMHK is making a calculated bet on efficiency, intelligence, and the next wave of digital services that will redefine industries and underpin Hong Kong's smart city ambitions.

The Strategic Imperative of a Network Overhaul

The decision to shutter a legacy network is driven by a powerful combination of economic reality and technological opportunity. Maintaining older 2G and 3G systems, which CMHK phased out in June 2025, is a significant operational drain. Industry analyses consistently show that legacy infrastructure is not only complex to manage but also notoriously energy-inefficient. According to one expert, simultaneously running 2G, 3G, 4G, and 5G networks can increase a base station's energy consumption by up to 40%. In a market defined by intense competition and pressure on operational expenditure, shedding this cost is a critical strategic move.

The true value, however, lies in the freed-up spectrum. These radio frequencies are the lifeblood of mobile communication, and reallocating, or "re-farming," the bands previously used for 2G allows for a significant boost in the capacity and efficiency of modern 5G and 5.5G networks. This translates directly into a better user experience—faster downloads, lower latency, and more reliable connections—but its business implications are far more profound. It enables a more robust foundation for high-definition voice calls (VoLTE), faster call connections, and the massive data throughput required by modern enterprise applications.

While CMHK's press release highlights its new status as an exclusively high-speed network provider, it's important to note the competitive context. The company was the last of Hong Kong's four major operators to make this move, following 3 Hong Kong in 2021, SmarTone in 2022, and HKT in 2024. This deliberate pacing allowed the operator to manage a long-tail transition for its user base, but it also means today's announcement officially closes the 2G chapter for the entire Hong Kong market, creating a level playing field where the competitive edge will be defined by the quality and innovation of next-generation services.

AI as the Engine of Transformation

Perhaps the most illuminating aspect of CMHK's network evolution is its deep reliance on artificial intelligence, a strategy that extends far beyond the transition itself. The company leveraged big data analytics and machine learning models to precisely identify the small fraction of customers—less than 2.27% of its base as of late 2025—still reliant on 2G services. This allowed for a highly targeted communications campaign involving over 8 million touchpoints, from intelligent outbound calls to personalized app reminders.

This, however, is merely the tip of the iceberg. Parent company China Mobile is an established global leader in developing "autonomous networks," a paradigm where AI and automation are systematically embedded into every layer of network operations. This transforms the network from a static piece of infrastructure into a self-optimizing, self-healing, and self-configuring organism. AI algorithms are used for predictive maintenance to prevent outages, for real-time traffic management to optimize performance, and for sophisticated fault analysis to reduce downtime.

For business customers, the benefits are tangible. An AI-powered network promises greater reliability and service assurance, which is critical for companies building their operations on digital platforms. Furthermore, CMHK is deploying AI to revolutionize its customer service, using intelligent voice assistants and AI-powered text services to resolve issues faster and more efficiently. This shift from reactive to predictive operations is a powerful competitive differentiator, creating a more resilient and responsive infrastructure capable of supporting the mission-critical applications of the future.

A Blueprint for Human-Centric Modernization

Technological progress often creates friction, leaving some users behind. A key challenge in sunsetting any widely used service is ensuring a smooth transition for the most vulnerable customers. CMHK's approach offers a valuable blueprint for balancing innovation with social responsibility. Recognizing that many of the remaining 2G users were elderly individuals with legacy devices, the company, with oversight from Hong Kong's Communications Authority, implemented a comprehensive support system.

This included proactive outreach, one-on-one on-site and remote assistance, and dedicated priority service channels at retail stores. To remove financial barriers, the operator provided subsidies for customers to replace their old phones and offered free next-generation USIM card replacements, extending the device subsidy program until the end of 2026 to ensure no one was left disconnected. By sending registered mail and providing large-print user guides, the company demonstrated an understanding that effective communication requires meeting customers where they are. This human-centric focus is not just good corporate citizenship; it is essential for maintaining brand trust and customer loyalty during a period of mandatory change.

Powering Hong Kong's Smart City Vision

The culmination of this network modernization effort is its role as a foundational enabler for Hong Kong's broader ambitions. The government's "Smart City Blueprint 2.0" outlines a future built on digital innovation across mobility, living, and commerce. This vision is wholly dependent on the kind of ultra-high-speed, low-latency, and high-capacity connectivity that advanced 5G and 5.5G networks provide.

These next-generation networks are essential for unlocking the true potential of the Internet of Things (IoT), where billions of devices—from traffic sensors and smart utility meters to autonomous vehicles and industrial robots—communicate in real-time. While Hong Kong boasts one of the world's highest 5G penetration rates among consumers, the next phase of growth hinges on business adoption. Studies project that 5G could add over HK$20 billion to Hong Kong's GDP by 2027, with the construction and logistics industries poised for significant transformation.

By retiring its legacy infrastructure and doubling down on 5.5G and AI, CMHK is positioning itself not just as a provider of connectivity, but as a core partner in this city-wide digital transformation. The new, streamlined network provides the robust platform needed to build and scale the complex AI and IoT applications that will drive efficiency, create economic value, and enhance the management of a world-leading city.