5G and Beyond: Speed, Latency and Connected Technology
5G is the fifth generation of mobile network technology, the family of systems the International Telecommunication Union (ITU) calls IMT-2020.[1] It was designed around three kinds of use: faster mobile broadband, very reliable low-delay links, and connecting very large numbers of devices.[2] This page explains what the main speed-related terms mean, why no single number tells the whole story, and where 5G-Advanced and 6G stand.
Short answer
- 5G is the generation of mobile systems after 4G. The ITU reported that the development of its standards was concluded in February 2021.[1]
- Bandwidth, throughput, latency, coverage and capacity are different things. The ITU’s headline figures, such as 20 Gbit/s peak downlink, are minimum requirements for judging candidate technologies under stated conditions. They are not what a typical user receives.[3]
- 5G-Advanced is the evolution of 5G in 3GPP Releases 18 to 20. 6G is still being studied and specified, and the ITU’s 6G figures are research targets.[4, 5]
How to read this page. Numbers in square brackets point to the sources under References. A statement without a number is our own plain-language explanation or illustration, not a research finding. Information about coverage and about the status of standards changes quickly. We checked it on 28 October 2026, and each such statement gives its date.
What is 5G, and how does it relate to earlier generations?
Mobile systems are described in generations. The ITU’s formal names for the generations that the market calls 3G, 4G, 5G and 6G are IMT-2000, IMT-Advanced, IMT-2020 and IMT-2030.[1]
| Generation | ITU name | Milestone reported by the ITU | Label |
|---|---|---|---|
| 3G | IMT-2000 | Initial standards approved in 2000.[1] | Established |
| 4G | IMT-Advanced | Defined in January 2012.[1] | Established |
| 5G | IMT-2020 | Development of the standards concluded in February 2021.[1] | Established |
| 6G | IMT-2030 | Framework Recommendation published in 2023; requirements and evaluation work followed.[1, 5] | In development |
In practice 5G arrived in stages. 3GPP, the group that writes the specifications, delivered the first non-standalone 5G specifications in late 2017. Non-standalone (NSA) 5G works alongside existing LTE networks, while standalone (SA) 5G pairs the new radio system with a next-generation core network.[6] In the UK, Ofcom describes standalone 5G as a newer form of 5G that is being rolled out alongside existing non-standalone services.[7]
What do speed, bandwidth, throughput, latency, coverage and capacity mean?
They answer different questions. Bandwidth is how wide the radio channel is, throughput is how much data actually arrives, latency is how long a message takes, coverage is where you can get a signal, and capacity is how much traffic a whole area can carry. People often use “speed” for several of these at once.
-
Bandwidth
- Question it answers
- How wide is the radio channel?
- What it means
- The ITU defines bandwidth as the maximum aggregated system bandwidth, which may use one or several radio carriers. Its 5G requirement is at least 100 MHz, with support for up to 1 GHz in higher frequency bands.[3]
- Common mix-up (our explanation)
- It is a width of radio spectrum, not a data rate. In the ITU’s formula the peak data rate is the channel bandwidth multiplied by the peak spectral efficiency.[3]
- Analogy (ours)
- The number of lanes on a road.
-
Throughput
- Question it answers
- How much data actually arrives each second?
- What it means
- User throughput is the number of correctly received bits over a period of time, while the user is active. The “user experienced data rate” is the 5% point of the distribution of user throughput.[3]
- Common mix-up (our explanation)
- The “peak data rate” is not throughput. It is the maximum under ideal, error-free conditions for a single device using all radio resources.[3]
- Analogy (ours)
- How many cars actually pass a point each minute.
-
Latency
- Question it answers
- How long does a message take to arrive?
- What it means
- The ITU’s user-plane latency is the radio network’s contribution to the one-way time for a packet to travel from source to destination, in unloaded conditions with the device active.[3]
- Common mix-up (our explanation)
- It is only the radio part of the journey. It is not the same as the “ping” time to a distant server, which includes everything beyond the radio link.
- Analogy (ours)
- The journey time for one car.
-
Coverage
- Question it answers
- Where can you get a signal?
- What it means
- Coverage describes where a service is available. Ofcom reports predicted 5G coverage outside premises for each UK operator, and separately for standalone 5G.[7]
- Common mix-up (our explanation)
- Coverage and capacity are different goals. The ITU describes wide-area coverage (where seamless coverage matters most) and hotspots (where very high traffic capacity matters most) as different cases.[2]
- Analogy (ours)
- Which towns the road reaches.
-
Capacity
- Question it answers
- How much traffic can an area carry in total?
- What it means
- Area traffic capacity is the total traffic throughput served per area (in Mbit/s per square metre). Connection density is the number of devices served per square kilometre.[3]
- Common mix-up (our explanation)
- Capacity is shared. A high total for an area does not mean each person in it gets that rate.
- Analogy (ours)
- The total traffic a whole road network can handle.
What do the ITU’s headline numbers actually mean?
The figures most often quoted for 5G come from the ITU’s minimum technical requirements for judging candidate radio technologies. Each one is tied to a particular usage scenario and test environment.
| Measure | ITU figure | What it measures | Conditions and context |
|---|---|---|---|
| Peak data rate | 20 Gbit/s downlink; 10 Gbit/s uplink | The maximum achievable rate for a single mobile device.[3] | Ideal, error-free conditions, with all assignable radio resources used. Defined for evaluating the enhanced mobile broadband scenario.[3] |
| User experienced data rate | 100 Mbit/s downlink; 50 Mbit/s uplink | The 5% point of the distribution of user throughput.[3] | A target in the “dense urban” test environment, assuming the bandwidth set out in a companion ITU report.[3] |
| User-plane latency | 4 ms (eMBB); 1 ms (URLLC) | The radio network’s one-way contribution to delivering a packet.[3] | Unloaded conditions (a single user), small packets, device in the active state.[3] |
| Reliability | 99.999% (1 − 10−5) success | The chance of delivering a 32-byte packet within 1 ms.[3] | At the coverage edge in the “urban macro” ultra-reliable test environment.[3] |
| Connection density | 1,000,000 devices per km² | Devices meeting a stated quality of service per unit area.[3] | For the massive machine-type scenario, with a message of a certain size delivered within a certain time and success probability.[3] |
| Area traffic capacity | 10 Mbit/s per m² downlink | Total traffic throughput served per area.[3] | In the “indoor hotspot” test environment.[3] |
| Bandwidth | At least 100 MHz; support for up to 1 GHz in higher bands | The maximum aggregated system bandwidth.[3] | Higher frequency bands, for example above 6 GHz, are needed for the widest channels.[3] |
Our interpretation: the headline numbers are useful for comparing technologies on paper, but they are conditions-bound targets. When you see a single figure quoted for “5G speed”, ask which of these measures it is, under what conditions, and for how many users.
Why do coverage, reliability and latency matter for different applications?
The ITU describes three usage scenarios for 5G. They put different demands on the network, which is why one headline number cannot describe all of them.[2]
-
Enhanced mobile broadband (eMBB)
- What the ITU says
- Human-centric uses such as access to multimedia content, services and data. It covers wide-area coverage and hotspot cases, which have different requirements.[2]
- What matters most
- High data rates; very high traffic capacity in busy hotspots; seamless coverage for wide areas.[2]
- Example named
- None beyond the two cases above.
-
Ultra-reliable and low-latency communications (URLLC)
- What the ITU says
- Stringent requirements for capabilities such as throughput, latency and availability.[2]
- What matters most
- Low delay and very high reliability.[2]
- Examples named
- Wireless control of industrial manufacturing or production processes, remote medical surgery, distribution automation in a smart grid, and transportation safety.[2]
-
Massive machine type communications (mMTC)
- What the ITU says
- A very large number of connected devices, typically sending a relatively low volume of data that is not delay-sensitive. Devices must be low cost with a very long battery life.[2]
- What matters most
- Number of devices per area, battery life and cost.[2]
- Examples named
- Connected “things” such as sensors, actuators, cameras and vehicles; the ITU names smart energy grids, agriculture, healthcare and vehicle-to-vehicle communication as likely fields for growth.[2]
Our interpretation: a service can fail for lack of coverage, even when the technology could meet its speed or latency target elsewhere. For a safety-critical use, reliability and coverage often matter more than the highest data rate.
How can 5G support the Internet of Things and connected devices?
The massive machine type scenario is about connecting very large numbers of devices that each send small amounts of data, at low cost and with long battery life.[2] In 2015 the ITU expected the number of connected devices to grow rapidly, possibly beyond the number of devices used by people, and expected a significant number of them to use IMT systems.[2] That was an expectation, not a measurement.
3GPP’s work reflects this. Its Release 17 list includes reduced-capability 5G devices and IoT over non-terrestrial networks, and Release 18 lists IoT and machine-type communication, including via satellite.[8, 9]
5G is one of several ways to connect IoT devices. For example, the first release of the Matter smart-home standard ran over Ethernet, Wi-Fi and Thread.[10] Our Internet of Things page explains how a device, its connection, its data and the service that uses them fit together.
What are examples of industrial monitoring, transport and connected services?
The standards name many possible uses. The table separates what the sources actually say from what they do not.
| Area | What the sources name | Caution |
|---|---|---|
| Industrial monitoring and control | The ITU names wireless control of industrial manufacturing or production processes as a URLLC example.[2] 3GPP lists “industrial and vertical uses, such as factories” among Release 18 themes, and non-public networks among Release 17 projects.[8, 9] | These are examples and work items in standards. They are not figures for how many factories use 5G. |
| Transport | The ITU names transportation safety as a URLLC example, and vehicle-to-vehicle and vehicle-to-road communication as possible IoT growth fields.[2] 3GPP lists vehicle-to-everything (V2X) application-layer services among Release 16 studies, and sidelink enhancements in Releases 17 and 18.[8, 9, 11] | Standardisation work, not deployment. We found no source we could cite on how widely 5G transport services are used. |
| Connected services | The ITU names smart grid distribution automation and remote medical surgery as URLLC examples.[2] 3GPP’s Release 17 and 18 work includes uncrewed aerial systems and vehicles, which we cover on the Drone Technology page.[8, 9] | Naming a use case does not show that it is available, safe or economic in practice. |
What are the practical limits of 5G?
| Limit | Why it matters | What the sources say |
|---|---|---|
| Peak is not typical | Headline numbers can be mistaken for everyday experience. | The ITU defines peak data rate as the maximum under ideal conditions, and its latency figures assume an unloaded network.[3] |
| Coverage varies | A fast network is no use where it does not reach. | In its May 2026 update (data to January 2026), Ofcom reported predicted 5G coverage outside premises for individual UK operators between 76% and 94%, and standalone 5G coverage between 49% and 85% across the three operators that have deployed it.[7] The ITU reports that 84% of people in high-income countries can access 5G, against 4% in low-income countries.[12] |
| Capacity depends on spectrum and sites | More capacity generally needs more spectrum, more sites, or both. | The ITU’s formula for area traffic capacity multiplies site density, bandwidth and average spectral efficiency.[3] The ITU also notes that several frequency ranges would be needed to meet capacity and coverage requirements.[2] We found no independent cost figures suitable to cite, so this page gives none. |
| Energy | Networks and devices both use power. | Energy efficiency is a defined ITU requirement, including the ability to sleep when there is no data to send.[3] 3GPP lists energy efficiency as a work area in Releases 18 and 20.[4, 9] We found no independent source we could cite comparing the total energy use of 5G with earlier networks, so this page makes no such claim. |
| Uneven access | Benefits reach people only where the network and affordable devices exist. | 5G subscriptions were about a third of mobile broadband subscriptions worldwide in 2025, but coverage is very uneven between income groups.[12] |
Our interpretation: the practical question is usually not “what can 5G do?” but “what can this network, in this place, for this many users, do right now?” The sources describe designs and targets, and coverage reports describe predictions.
What are 5G-Advanced and 6G, and where do they stand?
5G-Advanced is the next stage of 5G, not a new generation, and 6G is still in development. 3GPP calls Release 18 onwards “5G-Advanced”, and describes Release 20 as the final release that is “5G-Advanced only”, because it is also the study phase for 6G.[4, 9, 13]
| Step | What it is | Status as reported | Label |
|---|---|---|---|
| 3GPP Release 15 | The first phase of 5G, including non-standalone and standalone 5G.[6] | First non-standalone specifications delivered in late 2017.[6] | Established |
| 3GPP Release 16 | “5G Phase 2”.[11] | Completed at plenary meetings ending 3 July 2020.[11] | Established |
| 3GPP Release 17 | Includes reduced-capability devices, non-terrestrial networks, non-public networks and uncrewed aerial systems.[8] | Functional freeze at the March 2022 plenary.[8] | Established |
| 3GPP Release 18 | The first “5G-Advanced” release. Themes include satellite access, IoT and machine-type communication, sidelink and positioning, industrial uses, multicast and broadcast, network slicing and uncrewed aerial vehicles, plus energy efficiency, AI/ML and extended reality.[9] | Defined. The 3GPP page we read does not state its freeze dates. | Established |
| 3GPP Release 19 | The second 5G-Advanced release.[13] | Fully implementable specifications were available at the end of December 2025.[13] | Established |
| 3GPP Release 20 | The final “5G-Advanced only” release, and the study phase for 6G.[4] | Stage 1 frozen June 2025. Stage 2 final freeze planned for September 2026, stage 3 targeted for March 2027 and the final freeze for June 2027.[4] | In development |
| 3GPP Release 21 | Where 3GPP says 6G specification work (“normative work”) will happen.[4] | Planned. 3GPP says 6G needs two releases: Release 20 for studies and Release 21 for the specification.[4] | Forecast |
| ITU IMT-2030 (6G) | The ITU’s framework for 6G was published in 2023.[1, 5] | 3GPP states the ITU’s target for technology proposals is early 2029, with full specifications by mid-2030 at the latest.[4] | Forecast |
What are the ITU’s 6G targets?
The ITU’s 6G framework lists six usage scenarios: immersive communication, hyper-reliable and low-latency communication, massive communication, ubiquitous connectivity, AI and communication, and integrated sensing and communication.[5] It also gives ranges for capabilities, for example peak data rate examples of 50, 100 and 200 Gbit/s, over-the-air latency of 0.1 to 1 ms, and connection density of 106 to 108 devices per km².[5]
Forecast These are research targets, not services. The ITU says the ranges are “estimated targets for research and investigation”, that they may depend on factors such as frequency range and deployment, and that they may not be reached at the same time.[5] We found no source describing commercial 6G networks, so this page does not describe 6G capabilities as available.
Common questions
Is 5G always faster than 4G?
Not as a rule that can be applied to every connection. The ITU’s numbers are requirements for judging candidate technologies, and a person’s experience depends on factors including coverage, spectrum, how busy the network is and the device.[3, 7] We did not find an independent measurement source to cite for typical speeds, so this page gives none.
What does “1 millisecond latency” mean?
It is the ITU’s requirement for the radio network’s one-way contribution to delay in the ultra-reliable scenario, for small packets on an unloaded network.[3] It is not a promise that every application on every 5G connection will see 1 ms.
What is the difference between standalone and non-standalone 5G?
Non-standalone 5G works alongside existing LTE networks. Standalone 5G pairs the new radio with a next-generation core network.[6] Ofcom reports both in the UK, with standalone coverage lower than overall 5G coverage.[7]
Is 5G the same as the Internet of Things?
No. The Internet of Things is about connecting things and using their data. 5G is one family of networks that can carry that data.[2] See the Internet of Things page.
Is 6G available yet?
As of 28 October 2026, the sources we checked describe 6G as being studied and specified, with 3GPP planning specification work in Release 21 and the ITU targeting full specifications by mid-2030 at the latest.[4]
References
Each source is listed in the order it is first cited. The note under each one says what it supports and how it was checked. Where only an abstract or summary page was read, the note says so.
- ITU-R FAQ on International Mobile Telecommunications (IMT). International Telecommunication Union, Radiocommunication Sector. updated 30 September 2024.Supports: the ITU’s names for each mobile generation (IMT-2000, IMT-Advanced, IMT-2020, IMT-2030) and the milestones quoted. Checked against the full text (PDF).
- IMT Vision: framework and overall objectives of the future development of IMT for 2020 and beyond (Recommendation ITU-R M.2083-0). International Telecommunication Union. September 2015.Supports: the three usage scenarios (enhanced mobile broadband, ultra-reliable and low-latency communications, massive machine type communications), the examples the ITU names for them, and its 2015 expectations about connected devices. Checked against the full text (PDF).
- Minimum requirements related to technical performance for IMT-2020 radio interface(s) (Report ITU-R M.2410-0). International Telecommunication Union. November 2017.Supports: the definitions of peak data rate, user experienced data rate, latency, bandwidth, area traffic capacity, connection density, reliability and energy efficiency, and the minimum requirements with their conditions. Checked against the full text (PDF). These are requirements for evaluating candidate technologies, not measurements of real networks.
- Release 20 (3GPP specifications and technologies). 3GPP. page checked 28 October 2026 (it shows no update date; it refers to March 2026 material).Supports: Release 20 as the final 5G-Advanced-only release and the study phase for 6G, the planned freeze dates, and the plan for 6G specification in Release 21. Planned dates can move. Checked against the page.
- Framework and overall objectives of the future development of IMT for 2030 and beyond (Recommendation ITU-R M.2160-0). International Telecommunication Union. November 2023.Supports: the six usage scenarios for 6G and the ranges the ITU gives as “estimated targets for research and investigation”. Checked against the full text (PDF). These are research targets, not commitments or available services.
- Release 15 (3GPP specifications and technologies). 3GPP (3rd Generation Partnership Project). page update dated 26 April 2019.Supports: the first non-standalone 5G specifications (late 2017) and the difference between non-standalone and standalone 5G. Checked against the page.
- Connected Nations update: Spring 2026. Ofcom (UK communications regulator). 13 May 2026 (data as of January 2026).Supports: the UK 5G coverage ranges and the description of 5G standalone as a newer form of 5G rolled out alongside non-standalone 5G. These are predicted coverage figures at Ofcom’s “High Confidence” level and will change with later updates. Checked against the page.
- Release 17 (3GPP specifications and technologies). 3GPP. functional freeze March 2022, as stated on the page.Supports: the Release 17 completion and its listed work areas (for example reduced-capability devices, non-terrestrial networks, non-public networks, uncrewed aerial systems). Checked against the page.
- Release 18 (3GPP specifications and technologies). 3GPP. page checked 28 October 2026.Supports: Release 18 as the start of 5G-Advanced and its main themes. The page’s freeze dates are in an image that could not be read, so no freeze dates are quoted. Checked against the page.
- Matter arrives, bringing a more interoperable, simple and secure Internet of Things to life. Connectivity Standards Alliance (press release). 4 October 2022.Supports: what Matter aims to do and the networks the first release ran over. This is the standards body’s own announcement, so it shows intent, not independent evidence of results.
- Release 16 (3GPP specifications and technologies). 3GPP. completed July 2020, as stated on the page.Supports: the completion date of Release 16 (“5G Phase 2”) and the V2X item. The page does not describe individual features in detail. Checked against the page.
- Global number of Internet users increases, but disparities deepen key digital divides. International Telecommunication Union, press release on Facts and Figures 2025. 17 November 2025.Supports: the share of 5G in mobile broadband subscriptions and the gap in 5G coverage between high-income and low-income countries. Checked against the press release; the full report was not read.
- Release 19 (3GPP specifications and technologies). 3GPP. page checked 28 October 2026.Supports: Release 19 as the second 5G-Advanced release, with fully implementable specifications available at the end of December 2025. Checked against the page.