What is 5G? The fifth-generation mobile connection explained
Faster, more responsive and built to connect everything. Learn what 5G is, how it works, how it differs from 4G, and what it means for your business.
5G is the fifth generation of mobile network technology, designed for faster speeds, lower latency and far more connected devices than 4G. A 5G mobile connection is defined by the ITU’s IMT-2020 standard, which sets a peak download rate of 20 Gbps and latency as low as 1 millisecond. The first official commercial 5G launch was in South Korea on 3 April 2019.
- 5G launched commercially in 2019 and passed 3.1 billion subscriptions in the first quarter of 2026.
- The ITU’s IMT-2020 sets targets of a 20 Gbps peak rate, 100 Mbit/s user-experienced rate, 1 ms latency and up to one million devices per square kilometer. Real-world speeds are lower.
- 5G uses low-band, mid-band and high-band (millimeter wave) spectrum, so coverage and speed vary by band.
- Key technologies include massive MIMO, beamforming, small cells, edge computing and network slicing, which needs 5G Standalone.
- The evolution continues with 5G Advanced, and 6G is expected around 2030.
How does 5G work?
5G uses three layers of spectrum. 3GPP defines two frequency ranges: FR1 from 410 MHz to 7.125 GHz and FR2 from 24.25 GHz to 52.6 GHz, which later extended to 71 GHz. Within them:
- Low-band: below 1 GHz. Excellent coverage and indoor penetration, ideal for wide areas and rural regions.
- Mid-band: roughly 1 to 6 GHz. A balance of coverage and capacity, widely used in cities and suburbs.
- High-band (millimeter wave): above 24 GHz. Very high speeds and capacity, but short range, so it suits dense areas such as stadiums and city centers.
Several technologies work together on top of that spectrum:
Small cells. Many smaller antennas placed closer together make up for the short range of high-band signals, especially in urban areas.
Beamforming. Antennas focus the signal toward a user’s device instead of broadcasting in every direction, which improves efficiency and range.
Massive MIMO. Base stations use many more antenna elements to serve multiple users at once, which raises network capacity.
Edge computing. Processing closer to the cell tower cuts latency for real-time applications.
Network slicing. Operators create virtual slices of the network, each tuned for a specific need such as low latency or high reliability.
What is the difference between 5G Standalone and Non-Standalone?
Non-Standalone 5G relies on 4G infrastructure to help run the network, while 5G Standalone (SA) uses a dedicated 5G core. SA is what unlocks features such as network slicing. According to Ericsson, more than 90 of the roughly 390 operators with commercial 5G have launched 5G SA, and 84 commercial slicing offerings existed by June 2026, up from 65 six months earlier.
What are the main features of 5G?
- Faster speeds: the ITU requires a peak download rate of 20 Gbps. Real-world speeds are far lower but still a big step up from 4G.
- Lower latency: as low as 1 millisecond for critical uses, against about 10 milliseconds for 4G, which matters for real-time gaming, automation and connected vehicles.
- Higher capacity: up to one million devices per square kilometer, which suits crowded places and the growing number of IoT devices.
- Network slicing: dedicated virtual networks for specific applications, available with 5G Standalone.
How fast is 5G?
The ITU’s IMT-2020 standard requires a peak download rate of 20 Gbps and a minimum user-experienced rate of 100 Mbit/s. Those are targets under ideal conditions. In practice, Ookla measured median 5G download speeds of about 314 Mbps on T-Mobile and 219 Mbps on Verizon in the US in the first half of 2026, and your speed depends on the band, your operator and how busy the cell is.
5G vs 4G and 3G
- 3G (2001): mobile internet and video calls, with a minimum peak rate of 200 kbit/s.
- 4G (2009): all-IP mobile broadband. The ITU targets 100 Mbit/s in motion, 1 Gbit/s when stationary, and about 10 ms latency.
- 5G (2019): a peak rate of 20 Gbps, a user-experienced minimum of 100 Mbit/s, latency as low as 1 ms and up to one million devices per square kilometer.
Want the full picture? See our glossary entry on 2G and our guide to omnichannel in a 5G world for telecoms.
How does 5G benefit businesses?
Efficiency and productivity. Connected sensors and machines allow real-time monitoring, automation and predictive maintenance, which can reduce errors and downtime. Learn more in our guide to 5G use cases for business.
New products and services. Augmented and virtual reality for training and customer engagement, connected vehicles and high-quality remote consultations become more practical with higher speed and lower latency.
Better customer experience. Faster downloads, smoother video and more accurate location data support richer, more personalized experiences.
Flexibility. Network slicing and edge computing let businesses and operators build networks tailored to specific needs, including private 5G networks.
What is 5G Advanced, and what comes next?
5G Advanced is the evolution of 5G, starting with 3GPP Release 18. It builds on today’s networks rather than replacing them. 6G is expected to arrive around 2030, and you can read more in our guide to the evolution from 5G to 6G.
5G, messaging and Infobip
5G’s speed and capacity make rich, data-heavy channels such as RCS and WhatsApp faster and more engaging, and SMS remains the dependable fallback for any phone. Infobip is a communications platform that combines them, so businesses can reach customers on the best channel for their device and connection.
For telecoms, Infobip’s Network APIs let businesses tap into the core of telecom networks. Our post on how CAMARA transforms telco innovation explains the idea, and telecom CX solutions show it in action.
Conclusion
5G is more than a faster 4G. It adds lower latency, far more capacity and tools such as network slicing, which together open the door to new services for people, machines and businesses.
Check that your devices and plans support 5G, match each use case to the right network, and keep a fallback for areas without coverage. Infobip helps you reach customers on every channel with SMS, RCS, WhatsApp and APIs on one communications platform.
FAQs
5G is the fifth generation of mobile network technology, designed for faster speeds, lower latency and far more connected devices than 4G. It is defined by the ITU’s IMT-2020 standard, which sets a peak download rate of 20 Gbps and latency as low as 1 millisecond. The first commercial networks launched in 2019.
The first official commercial 5G launch was in South Korea on 3 April 2019, with US operators launching the same day. 3GPP Release 15 provided the first full set of 5G standards. According to the Ericsson Mobility Report, 5G subscriptions passed 3 billion in the first quarter of 2026.
The ITU’s IMT-2020 standard requires a peak download rate of 20 Gbps and a minimum user-experienced rate of 100 Mbps. Real-world speeds are lower. In the first half of 2026, Ookla measured median 5G download speeds of about 314 Mbps on T-Mobile and 219 Mbps on Verizon in the US.
5G offers much higher speed, lower latency and far greater capacity than 4G. The ITU sets a peak rate of 20 Gbps against 1 Gbps for 4G, and latency as low as 1 millisecond against about 10 milliseconds. 5G also supports up to one million devices per square kilometer, which suits IoT.
Yes, you need a 5G-capable phone and a plan or network that supports 5G in your area. 4G phones keep working on 4G networks, so there is no need to rush. Coverage matters too, because 5G is not available everywhere, and speeds vary by spectrum band and location.
It depends on your operator and plan. Some operators charge extra for 5G or premium plans, while others include it in standard plans. Check your operator’s current pricing, and remember that you also need a 5G-capable phone. 4G plans remain available and still work well for everyday use.
5G Standalone, or 5G SA, runs on a dedicated 5G core network instead of relying on 4G infrastructure. It unlocks features such as network slicing. According to Ericsson, more than 90 of roughly 390 operators with commercial 5G have launched 5G SA, so most 5G today still gets some support from 4G.
Network slicing creates virtual, dedicated networks on top of shared 5G infrastructure, each tuned for a specific need such as low latency or high reliability. It requires 5G Standalone. Ericsson counted 84 commercial slicing offerings from operators by June 2026, up from 65 six months earlier.