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You have upgraded to full fibre, the router's lights are all green, and the video call still breaks up in the back bedroom. So you start looking at routers with bigger numbers on the box. Before you spend anything, it helps to know what those numbers actually change. Wi-Fi 6, 6E and 7 are not three rungs on one ladder. They are two generations of the same idea, plus an extra radio band that behaves very differently the moment it meets a British brick wall.
The generation that replaced Wi-Fi 5, and still the sensible baseline. It uses the same 2.4 GHz and 5 GHz bands as before, but shares them far more politely. OFDMA chops a channel into small slices so dozens of devices can transmit at once, BSS colouring lets your router ignore next door's chatter, and target wake time helps battery-powered sensors and doorbells last longer. The headline gain is not raw speed; it is steadiness when the whole house is online at once.
Identical standard, one addition: the 6 GHz band. The UK has opened part of that spectrum for Wi-Fi, which means clean air, wider channels available without stepping around radar systems, and no older devices cluttering it. Both your router and the phone or laptop in your hand must support 6E to use it at all.
The current generation, working across 2.4, 5 and 6 GHz. It doubles the widest channel to 320 MHz, packs more data into each transmission, and adds Multi-Link Operation, where a device can use two bands at once for extra throughput or, more usefully, to hop bands the instant one gets busy. It is fully backwards compatible, so nothing breaks if you buy it early.
Manufacturers love big numbers. The figures on the packaging are sums of every stream in perfect laboratory conditions, not what your laptop will see. In a normal room, a good Wi-Fi 6 setup on 5 GHz often delivers several hundred megabits per second; pass through two walls and that can fall sharply.
Your broadband is the harder ceiling. If your line delivers 70 Mbps, no router will download faster than that. Full-fibre packages in the UK commonly sit anywhere between 100 Mbps and a gigabit, and in most homes the Wi-Fi link is no longer the bottleneck. Wi-Fi 7's advantages appear when a Wi-Fi 7 laptop or phone talks to a Wi-Fi 7 router, and mostly on transfers inside the network: backups to a NAS, large files between machines, VR headsets. A Wi-Fi 6 laptop connecting to a Wi-Fi 7 router simply behaves like Wi-Fi 6.
Higher frequencies carry more data and travel less well. That is the trade you make with 6 GHz. It behaves like 5 GHz but more so, so it fades faster through Victorian brick, stone cottages, foil-backed plasterboard and anything with underfloor heating pipes in the way.
This is the part buyers get backwards. Adding 6E or Wi-Fi 7 does not fix a coverage problem; it can make one more visible, because the fast band rarely reaches the far end of the house. If the back bedroom has always been weak, the answer is more access points, not a newer standard. A mesh system with a wired Ethernet backhaul beats a mesh relying on wireless backhaul every time, and a single cable to a desktop or a mesh node outperforms any band you can name.
Work through it in order. Find out what speed actually arrives at the router. Identify whether your problem is coverage or congestion. Then look at which of your devices can use each band.
That usually settles it. Wi-Fi 6 remains a solid, well-priced buy in 2025 and will keep working with everything for years. Wi-Fi 6E is a genuine step up if your 5 GHz band is crowded by neighbours and you own 6E devices. Wi-Fi 7 is the right call if you already have Wi-Fi 7 clients and a very fast line, and harmless future-proofing otherwise, just not a fix for a dead spot.
One last practical note: if you rent, or live in a listed building, check before drilling for cable runs or ceiling-mounted access points. A tidy setup is worth planning properly once, rather than buying a louder box twice.
Photo: Pascal 📷 / Pexels
