5G bands explained — n78, n41, n71 and why they decide your speed
5G bands are the specific radio frequencies a network uses, written with an n prefix — n78, n41, n71. Low-band travels far but is only marginally faster than LTE, mid-band such as n78 and n77 delivers the speeds people associate with 5G, and mmWave is extremely fast over very short distances. A phone only works on the bands its hardware supports, which is why an imported handset can show 5G yet never reach full speed.
When people ask whether a phone "supports 5G", the honest answer is that the question is too coarse to be useful. What matters is which bands it supports, and whether those overlap with what your carrier actually runs.
This is a reference rather than a troubleshooting guide. If your speeds are disappointing, the slow-5G guide covers the causes.
How bands are named
5G bands carry an n prefix — n78, n41, n258. The number identifies a specific slice of radio spectrum, defined globally by 3GPP so equipment from different manufacturers interoperates.
They fall into two ranges:
- FR1, everything below roughly 6 GHz, often called sub-6. This is the overwhelming majority of real-world 5G.
- FR2, the millimetre-wave bands above 24 GHz. Very fast, very short range, rare outside dense city deployments.
Within FR1 it is more useful to think in three tiers.
Low-band — coverage, not speed
| Band | Frequency | Where it is common |
|---|---|---|
| n71 | 600 MHz | United States |
| n28 | 700 MHz | Europe, Asia, Australia, Latin America |
| n5 | 850 MHz | Widely deployed |
| n8 | 900 MHz | Europe, Asia |
Low-band signals travel a long way and pass through walls well. Carriers use them to claim broad 5G coverage, often by refarming spectrum that previously carried 3G or LTE.
The trade-off is bandwidth. There is not much spectrum available down here, so speeds land close to a good LTE connection. Genuinely useful for reaching rural areas and building interiors — just not the 5G of the advertising.
Mid-band — the useful tier
| Band | Frequency | Where it is common |
|---|---|---|
| n78 | 3.3–3.8 GHz | The global workhorse — Europe, Asia, Australia |
| n77 | 3.3–4.2 GHz | United States, Canada; overlaps n78 |
| n41 | 2.5 GHz | United States, Japan, China |
| n79 | 4.4–5.0 GHz | China, Japan |
| n40 | 2.3 GHz | India, parts of Asia |
This is where 5G becomes worth having. Mid-band offers far more bandwidth than low-band while still covering a useful radius, and it is where most carriers concentrate capacity.
n78 is the single most important band globally. If a phone supports only one 5G band, this is the one to want almost anywhere outside North America.
n77 and n78 overlap substantially, and many phones list both. Support for one does not automatically mean full support for the other, since the ranges are not identical.
mmWave — extremely fast, rarely relevant
| Band | Frequency | Notes |
|---|---|---|
| n258 | 26 GHz | Europe, Asia |
| n260 | 39 GHz | United States |
| n261 | 28 GHz | United States |
mmWave delivers the multi-gigabit figures used in launch demonstrations. It also barely penetrates glass, is blocked by your own hand, and reaches a block or two at best.
Deployments are limited to stadiums, airports, transport hubs and dense downtown areas. For most people mmWave support is not worth paying for, and its absence from a phone is rarely the reason 5G feels slow.
Why imported phones disappoint
This is the practical consequence of all the above, and it catches people out constantly.
Manufacturers ship regional variants with different band support, because supporting every global band raises cost and complicates antenna design. A model sold in one market may omit precisely the band your carrier relies on.
The failure mode is subtle. The phone connects to 5G on a low-band carrier, displays the 5G icon, and appears to work — while being physically incapable of the mid-band that would have made it fast. Nothing looks broken.
There is no software fix. Band support is determined by the modem and the antenna hardware.
Before buying an imported or grey-market handset, check the exact model number against the bands your carrier deploys. Two phones with identical marketing names and different model suffixes routinely support different bands.
Band is not the whole story
Two more factors sit alongside it:
Bandwidth. A carrier with 100 MHz on n78 will beat one running 20 MHz on the same band. Same band, very different experience.
Carrier aggregation. Combining multiple carriers, sometimes across bands, is where peak speeds come from. Which combinations a phone supports is a firmware-level detail that varies by model, and cheaper handsets typically support fewer.
Checking what your phone supports
Android does not surface a band list in settings, and manufacturer specification sheets are often incomplete or regionally inaccurate.
Two reliable approaches:
- Read the device's reported capability directly, which is what 5G Check does — the hardware's own answer rather than a marketing page.
- Check the exact model number against the manufacturer's regional specifications. Match the full model code, not the marketing name.
Then compare that against the bands your carrier publishes for your area.
Frequently asked questions
Which 5G band is the most important?
n78, for most of the world. It is the primary mid-band deployment across Europe, Asia and Australia. In the United States, n41 and n77 matter more.
Does supporting more bands make a phone faster?
Not directly. Supporting the right bands for your carrier matters; supporting many irrelevant ones does not help. A phone with n78 on an n78 network beats one with a dozen bands that excludes it.
Do I need mmWave support?
Almost certainly not. Coverage is confined to small pockets of dense urban areas, and it does not penetrate buildings. Mid-band support is far more consequential for everyday use.
Can a software update add 5G bands?
No. Band support is fixed by the modem and antenna hardware. An update can sometimes enable a band the hardware already supports but had disabled, though this is uncommon and entirely at the manufacturer's discretion.
Why does my phone support 5G but never connect to it?
Usually a band mismatch — the phone's 5G bands do not overlap with what your carrier deploys locally. It can also mean standalone 5G is required in your area and the device only supports non-standalone.