6G: Where Are We, And What Lies Ahead?

Every decade or so, cellular communications take a huge leap – leaving the world looking completely different. 6G is another huge leap ahead, but what does 6G promise, what’s the commercial status of 6G, and what should device innovators be thinking about in 2026?

Overview of evolution from 2G to 5G

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Mobile networks evolved dramatically over the decades, with each new generation solving the limitations of the last. It’s fundamentally a story of increasing speed, shrinking latency and faster networks, and expanding the definition of how humans and devices connect:

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• 2G marked the transition from analogue to digital cellular communication. This shift brought basic data services including SMS.
• 3G arrived in the early 2000s, bringing mobile internet to consumers for the first time, with peak speeds reaching around 2 Mbps.
• 4G emerged around 2010, and delivered a leap in mobile broadband performance — peak speeds of 100 Mbps to 1 Gbps.

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5G began rolling out commercially in 2019 and extended mobile connectivity far beyond the smartphone. 

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With peak speeds up to 20 Gbps, sub-millisecond latency, and the ability to support up to 1 million connected devices per km², 5G was designed with machines as much as people in mind.

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Introduction to 6G

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6G is the next stage in the evolution of cellular communications, including 6G for IoT. It’s the sixth generation of mobile wireless technology, and it's currently in active standardisation under the ITU's IMT-2030 framework and 3GPP's Release 21 roadmap.

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That means it’s not yet available commercially – and in fact, commercial availability is some distance away, targeted to around 2029–2030. 

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It’s a major evolution, however. 6G is designed to deliver peak speeds up to 1 Tbps, latency as low as 0.1 microseconds, and connection densities of up to 100 million devices per km². So it’s not just an incremental performance gain. 

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The overall ambition is greater too. 6G is being built as an AI-native network where intelligence is embedded directly into the air interface, the radio network, and the core. 

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How 6G differs from 5G

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Speed is a clear differentiator, but there’s a much bigger difference between 5G and 6G. The latest generation of networks are being completely redesigned in terms of what they do.

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• Speed and latency: 5G delivers peak speeds up to 20 Gbps with around 1 ms latency but 6G standard-setting is targeting 1 Tbps. That’s fifty times faster, and with latency as low as 0.1 microseconds which should in theory enable applications such as holographic communication and a tactile internet.
• AI integration: In 5G, AI is an add-on layer applied to network management and optimisation. With 6G AI is native to the architecture itself and the standard setting aims to embed AI directly into the network from the ground up.
• Sensing capability: Up until 5G, cellular connectivity is purely a communications network: 6G introduces integrated sensing and communication (ISAC), so the same radio waves used to transmit data will simultaneously be used as a radar-like system to "see" and map the physical environment.
• Spectrum range: 5G operates across sub-6 GHz and mmWave bands; 6G expands into the upper mid-band (7–24 GHz) as its primary range, with sub-terahertz frequencies for specialised short-range scenarios such as indoor holographics.

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The new standard is also doing more to integrate terrestrial and satellite networks. 5G is fundamentally a terrestrial network with satellite integration as an afterthought; 6G is being designed from the outset to unify terrestrial, aerial, and satellite connectivity into a single seamless system.

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Novel applications enabled by 6G

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There’s little doubt that 6G for IoT is a big leap forward. But what will this technology revolution enable? Many of the use cases are still to emerge, but some of the fantastic technological leaps we can look forward to include:

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• Integrated sensing for smart environments: Through ISAC, 6G networks will double as environmental sensors. Think real-time flood detection, drone traffic management, and autonomous vehicle coordination. All without requiring separate sensor infrastructure.
• Tactile and haptic internet: Ultra-low latency means touch and physical feedback can be carried over a network. Think remote surgery, precision robotics, and immersive extended reality experiences with physical sensations.
• Massive AI-driven IoT at scale: With connection densities up to 100 million devices per square km 6G will support fully autonomous smart city and industrial environments. Think AI-native networks managing billions of devices in real time.

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And, by natively integrating low-Earth orbit satellites, 6G will eliminate connectivity dead zones entirely so devices can get high performance internet anywhere: sea, in remote regions, and at speeds up to 1,000 km/h on aircraft and high-speed rail.

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What still needs to happen commercialise 6G

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Standardisation is the most immediate hurdle, because 6G is still evolving – the standard is not set. Without a set standard, in most instances, commercialisation can’t go ahead as vendors can deliver interoperable products.

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3GPP Release 21 is the first specification work directly targeting and it’s underway, but the organisation is not expected to finalise its scope and duration until mid-2026, with full specifications not completed until 2027–2028. 

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Running in parallel, the ITU's IMT-2030 framework needs to be translated into globally harmonised technical requirements that all major vendor and operator ecosystems can align to. 

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And alignment, of course, takes time because there’s significant negotiation needed between regions with competing commercial and geopolitical interests.

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Blocked by spectrum availability?

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Spectrum is a finite natural resource, and the radio frequencies 6G needs are either already occupied or heavily contested by other users. 

The candidate bands most suited to 6G are currently allocated to incumbent services including satellite operators, Wi-Fi, and scientific operations like radio astronomy. This means regulators must negotiate complex sharing arrangements or relocate existing users before mobile operators can access them. 

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Most countries currently have only around 1 GHz of mid-band spectrum identified for mobile use, against a requirement of 2–3 GHz for 6G. 

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Addressing this gap requires coordinated international policy action. 

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5G is still evolving with new use cases

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6G captures the imagination – and it certainly should – but 5G is far from a finished story. Many of the transformative use cases 5G was designed for are only beginning to reach commercial viability. 

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For 2026, 6G remains a standardisation exercise that isn’t entirely distant from being a research project. There’s relatively little that device innovators can do around 6G as the standards are still being said. (Observing the direction of travel is nonetheless  

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Commercialisation is still the better part of a decade away for most of the world. The near-term opportunity lies in extracting full value from 5G including the latest iterations of 5G - and indeed IoT standards such as SGP.32, which is steadily getting commercialised.