WiFi Explained: 2.4GHz vs 5GHz vs 6GHz — Which Band Should You Use?
Your router broadcasts on multiple frequency bands — but what does that actually mean, and which one should your devices connect to? Here is everything explained simply.
Quick answer: 2.4GHz travels further through walls; 5GHz is faster at close range; 6GHz is the fastest but shortest range, available on WiFi 6E and 7 devices only.
When you look at your WiFi network list you might see two or three networks from the same router — one labelled 2.4G and one labelled 5G, and increasingly a third labelled 6G. These are different frequency bands, each with its own trade-offs between speed, range, and interference.
Understanding the differences helps you get the best performance out of every device in your home — from smart bulbs to gaming consoles to laptops.
The Three WiFi Bands at a Glance
| 2.4 GHz — Range | Excellent. Travels 30–50m indoors and passes through walls well. |
|---|---|
| 2.4 GHz — Speed | Slower. Maximum ~600 Mbps on WiFi 5, but real-world speeds are often 50–150 Mbps. |
| 2.4 GHz — Congestion | High. Only 3 non-overlapping channels in Australia. Shared with Bluetooth, microwaves, and baby monitors. |
| 5 GHz — Range | Good. 15–30m indoors. Weaker wall penetration than 2.4 GHz. |
| 5 GHz — Speed | Fast. Up to 3.5 Gbps on WiFi 6. Real-world speeds of 300–900 Mbps are common at close range. |
| 5 GHz — Congestion | Low. 24 non-overlapping channels. Much less interference from household devices. |
| 6 GHz — Range | Shorter. 10–20m indoors. Does not penetrate walls well. |
| 6 GHz — Speed | Fastest. Up to 9.6 Gbps theoretical (WiFi 6E). Requires WiFi 6E or WiFi 7 devices. |
| 6 GHz — Congestion | None yet. Entirely new spectrum with up to 59 channels. No legacy devices to compete with. |
2.4 GHz — The Long-Range Band
The 2.4 GHz band has been used since the original 802.11b WiFi standard in 1999. Its long wavelength gives it excellent range and wall penetration — a 2.4 GHz signal can travel through several walls and floors where a 5 GHz signal might struggle.
Best for:
- Smart home devices (lights, plugs, sensors) that just need a basic connection
- Devices far from the router or access point
- Older devices that only support 2.4 GHz
The downside: The 2.4 GHz band is severely congested. In a typical Australian suburb, your router's 2.4 GHz signal competes with every neighbour's router, all your Bluetooth devices, your microwave oven, and your baby monitor. There are only three non-overlapping channels (1, 6, and 11), meaning routers in nearby homes are almost always stepping on each other's frequencies.
5 GHz — The Everyday Workhorse
The 5 GHz band is the right choice for most devices most of the time. It offers significantly faster speeds than 2.4 GHz, far less congestion (24 non-overlapping channels), and good range within a room or through a single wall.
Best for:
- Laptops, phones, and tablets
- Streaming video (Netflix, YouTube, Disney+)
- Gaming consoles
- Any device within 15 metres of the access point
Modern dual-band routers and access points — including the UniFi U6+ (MPN: U6+) — broadcast both 2.4 GHz and 5 GHz simultaneously. Most will automatically steer your device to the best band using band steering technology.
6 GHz — The Future Band (WiFi 6E and WiFi 7)
The 6 GHz band was opened for WiFi use in Australia in 2021. It offers a massive 1200 MHz of fresh spectrum — more than the 2.4 GHz and 5 GHz bands combined. This translates to extremely high speeds and virtually zero interference from legacy devices, since only modern WiFi 6E and WiFi 7 devices can use it.
Best for:
- High-bandwidth devices very close to the access point
- VR headsets, high-resolution video streaming, and fast file transfers
- Multi-gigabit wireless backhaul in mesh systems
The catch: 6 GHz signals are shorter range and struggle with walls more than 5 GHz. Your phone needs to support WiFi 6E or WiFi 7 to connect to it. Most devices sold before 2022 cannot use 6 GHz at all.
The Ubiquiti U6-Enterprise (MPN: U6-ENTERPRISE) is a tri-band WiFi 6E access point that broadcasts all three bands simultaneously, with a 2.5 GbE uplink to handle the combined throughput.
WiFi Standards — 5, 6, 6E, and 7 Explained
WiFi standards (the 802.11 family) define maximum speeds and which bands are supported:
| WiFi 5 (802.11ac) | 2.4 GHz + 5 GHz. Max ~3.5 Gbps theoretical. Still very common — most devices from 2015–2021. |
|---|---|
| WiFi 6 (802.11ax) | 2.4 GHz + 5 GHz. Max ~9.6 Gbps. More efficient in crowded areas thanks to OFDMA and MU-MIMO. Common from 2020 onwards. |
| WiFi 6E | 2.4 GHz + 5 GHz + 6 GHz. Same 9.6 Gbps max as WiFi 6 but with the cleaner 6 GHz spectrum. Devices from 2022+. |
| WiFi 7 (802.11be) | All three bands. Up to 40 Gbps theoretical with Multi-Link Operation (MLO). The current cutting edge — devices from 2024+. |
Which Band Should Each Device Use?
Here is a practical guide for assigning devices to the right band:
- Smart home sensors, old printers, IoT devices → 2.4 GHz (they likely only support it anyway)
- Phones, tablets, laptops in the same room → 5 GHz or 6 GHz if supported
- Streaming TV sticks and smart TVs → 5 GHz
- Gaming consoles → 5 GHz, or better yet, a wired Ethernet connection via a network switch
- Devices far away or through multiple walls → 2.4 GHz or consider adding a second access point
If you are on NBN with a 100 Mbps or 250 Mbps plan, even 2.4 GHz is technically fast enough for your internet connection — the real benefit of 5 GHz is lower latency and less interference, not raw internet speed.
Use 5 GHz for anything that needs speed — laptops, phones, streaming devices. Use 2.4 GHz for smart home devices or anything far from the router. Most modern routers handle this automatically with band steering.
This usually means your device is too far from the router or access point. At long range, 5 GHz will drop to a lower data rate than 2.4 GHz to maintain the connection. The fix is adding a second access point closer to the device, or using a wired connection.
Not urgently. WiFi 6E and 7 are future-proofing — they provide cleaner 6 GHz spectrum and faster speeds for the next generation of devices. If you are buying a new router or access point today, WiFi 6E or 7 is worth paying for. If your current gear works well, there is no urgent reason to upgrade.
Microwave ovens operate at 2.45 GHz — right in the middle of the 2.4 GHz WiFi band. They leak small amounts of electromagnetic energy that can disrupt nearby WiFi signals. Switching affected devices to 5 GHz solves this immediately.
Want to extend your WiFi properly? The UniFi access point range uses dedicated radios for each band, with seamless roaming across your whole home.
Explore UniFi Access Points →