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Home»Startup»What is 5G? The Complete Guide to When, Why, and How
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What is 5G? The Complete Guide to When, Why, and How

January 1, 2023No Comments6 Mins Read
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What is 5G? The Complete Guide to When, Why, and How
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The future depends on connectivity. From artificial intelligence and self-driving cars, to telemedicine and mixed reality, to as yet undreamed technologies, all the things we hope will make our lives easier, safer, and healthier require high-speed, always-on internet connections. To keep up with the demand, the mobile industry introduced 5G—so named because it’s the fifth generation of wireless networking technology.

5G brings faster speeds of up to 10 gigabits per second (Gbps) to your phone. That’s fast enough to download a 4K movie in 25 seconds. But 5G is not just about faster connections. It also delivers lower latency and allows for more devices to be connected simultaneously.

What is 5G?

As the fifth generation of cellular networks, 5G is a global wireless standard. All cellular networks send encoded data through radio waves. Radio waves have different frequencies and are divided into bands. Previous generations, like 4G, operated on low- and mid-band frequencies, but 5G can operate on low-, mid-, and high-band (also known as millimeter wave) frequencies. Lower frequencies can travel farther and penetrate through obstacles but offer relatively low speeds, while higher frequencies are much faster but have a limited range and struggle to pass through objects.

While 5G opens up a swathe of unused radio frequencies at the high end of the spectrum, it also encompasses new technologies and techniques for combining chunks of spectrum that are already in use. At the low end, 5G looks and feels very much like 4G.

The 5G Rollout

Carriers have been building their 5G networks for a few years now, but they have adopted different approaches. All the carriers began by building 5G atop their existing networks, which provided lots of connectivity, but not at the high speeds associated with 5G. More recently, they have started building out new high-band 5G networks, but these are largely confined to cities or specific venues within cities. You can get a broad overview by using Ookla’s 5G map.

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Verizon offers low-band 5G across the country, labeled as 5G Nationwide on its coverage map. Verizon offers mid-band 5G in many urban areas and high-band 5G in many cities, but the mid- and high-band coverage are lumped together and labeled 5G Ultra Wideband or 5G UW.

AT&T also offers low-band 5G coverage across much of the country and mid-band coverage in some cities, both labeled simply as 5G on its coverage map. AT&T’s high-band 5G is currently limited to a selection of venues, like stadiums, and is labeled as 5G+. Early in its 5G efforts, AT&T marketed its spiffed-up LTE network as “5G E” and was rebuked by the National Advertising Review Board for misleading customers.

T-Mobile offers low-band 5G across the country, labeled as 5G Extended Range on its coverage map. Its mid- and high-band 5G is labeled as 5G Ultra Capacity.

Ultimately, 5G availability and speeds are variable because 5G service is offered in three bands. Low-band, which generally operates below 1 GHz, can reach speeds of 250 Mbps. The trade-off for low-band’s comparatively slower speeds is a broad reach, which means carriers can leave more distance between towers using this kind of equipment.

Analysts call the mid-band of the 5G spectrum the sweet spot, as it has a broad geographic reach and is faster than low-band. Mid-band operates between 1 and 6 GHz and can achieve speeds up to 1 Gbps.

But to reach the top speeds associated with 5G, carriers need millimeter-wave (or mmWave) technology, which takes advantage of the high end of the wireless spectrum, operating at 20 GHz and up. mmWave can enable multi-gig speeds, but millimeter-wave signals are less reliable over long distances and easily disrupted by obstacles like trees, people, and even rain. To make it practical for mobile use, carriers must deploy huge numbers of small access points in cities, instead of relying on a few big cell towers as they do today.

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Figuring out whether 5G is available for you, and in what form, requires a bit of detective work, but you will also need a device capable of handling a 5G signal.

5G Smartphones

Anyone wishing to take advantage of these new 5G networks needs a capable device. Most major phone makers offer 5G handsets now, but, as we’ve seen, 5G is an umbrella term. All 5G phones have low- and mid-band support (often labeled “sub-6,” as they operate at frequencies of 6 GHz and lower), but not all 5G phones are capable of high-band connections. If you want a smartphone that can take advantage of high-band (mmWave) networks, look for mmWave support.

You can find mmWave support in high-end phones like Apple’s iPhone 14 Pro, Google Pixel 7 Pro, and the Samsung Galaxy S22 in the US. It’s worth noting that these same models are often sold without mmWave support in other countries.

What Does 5G Mean For Me?

Much of the buzz around 5G is focused on its potential. Since smartphones connected to 4G LTE can already stream high-quality video, you may be wondering what 5G brings to the table for regular folks. Aside from faster download speeds, lower latency benefits multiplayer and cloud gaming by boosting responsiveness. And 5G’s higher capacity for multiple devices to be connected without issue also helps to keep us all online when we are part of a crowd, whether it’s a packed concert or a football game.

The stability and speed of 5G also promise improvements for driverless cars, remote-piloting drones, and anywhere else where response time is crucial. While tangible benefits today are limited, there is enormous potential for more cloud computing services, augmented reality experiences, and whatever comes next. But a real killer 5G app for consumers remains elusive. 

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The Race for 5G Dominance

The US has been keen to claim a leadership role in worldwide 5G deployment, but so far it hasn’t fully succeeded. China-based Huawei is the world’s leading maker of 5G network equipment, and while its equipment is deployed widely, the company has faced scrutiny and even bans from Western nations for its alleged ties to the Chinese government. Other companies that make 5G equipment, like Nokia, Ericsson, and Samsung—none of which, notably, are headquartered in the US—may have benefited from the bans.

From a speed perspective, the US doesn’t appear in the top 15 nations, according to the UK-based research firm Opensignal, which found that South Korea had the top 5G download speed at 432.7 Mbps, followed by Malaysia, Sweden, Bulgaria, and the United Arab Emirates. Where the US did score highly was in 5G availability, with a score of 25.2 percent, meaning users spent over one-quarter of their time with an active 5G connection—an impressive result for a country the size of the US, and a sign that the rollout is gathering pace.

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