Optimize Your Signal

Most "bad Wi-Fi" is caused by five decisions made once, years ago, and never revisited: where the router sits, which band devices use, which channels the radios occupy, whether firmware is stale, and whether the far rooms were ever meant to be served by one box. Fix them in that order and most homes get dramatically better without buying anything.

Step 1 — Move the real antenna: the router

An access point radiates roughly spherically; the part of the house it serves worst is whatever it's hiding behind. Every extra wall between router and device costs real throughput at 5 GHz — a stud wall with wiring and drywall typically cuts signal 3–6 dB (halving-ish the power), brick or concrete far more, and a floor between them both. Position rules in priority order:

1. Central and highPut it in the middle of the floor plan you care about, on a shelf or wall-mounted at 1.5–2 m (5–6 ft). A cupboard or the floor is the classic mistake — the one place routers get banished for looks is exactly where they work worst.
2. Away from metal, water, and glassTV cabinets with metal backs, fish tanks, big mirrors, and brick/chimney stacks are signal eaters. Give the router breathing room from all of them.
3. Keep the antennas verticalA vertical antenna broadcasts horizontally — the wide, flat donut you want to cover a floor. Angle one perpendicular if a whole upper floor needs love, but don't point any of them at the room you want to cover.
4. Distance beats elevationIf the only choice is hallway or living room, take the room you actually use. Half a meter off the floor does far less for you than being nearer to where life happens.

Step 2 — Put devices on the right band

Once positioned, the biggest speed wins come from making sure devices use the band that fits their situation rather than whichever they grabbed first:

• Close to the router: 5 GHz or 6 GHz. These bands are uncrowded and wide — for streaming, video calls, downloads, anything that matters, this should be automatic.
• Far from the router, through walls: 2.4 GHz can be the only thing that reaches, though far slower. If a far room is your office, treat that as a placement or mesh problem (Step 5), not a band problem.
• Smart-home gadgetry (bulbs, plugs, cameras): most of these are 2.4 GHz-only. That's fine and even desirable — you want them living on the band that reaches farthest and that the phones don't need.
• Band steering with one network name: modern routers advertise a single SSID on all bands and nudge clients toward the better one. It usually works; when it doesn't, some routers let you separate the names (e.g. MyHouse and MyHouse_2.4G) or set "preferred band" per device. See the iPhone and Android guides for the phone side.

Step 3 — Claim the cleanest channels

Your router transmits into shared air that the neighbors are also broadcasting through. The default behavior — auto-channel-selection once per reboot — isn't bad but occasionally settles somewhere silly. The strategy differs by band:

• 2.4 GHz: only 1, 6, and 11 are non-overlapping. Pick whichever is emptiest. A free analyzer app (like the one built into most Android Wi-Fi settings, or a desktop Wi-Fi analyzer) shows the neighborhood; set width to 20 MHz — 40 MHz in this band almost always hurts more than helps.
• 5 GHz: wider channels shine here — 80 MHz is the default sweet spot for Wi-Fi 5/6. Stay off the DFS channels if you live near an airport or weather radar and have noticed mystery blinks; the non-DFS parts of U-NII-1 (36–48) are usually the safe bet.
• 6 GHz (Wi-Fi 6E/7): so clear today it barely needs planning; leave it on auto — and know your older devices will simply never see it, which is the design, not a fault.

Step 4 — The router's own hygiene

• Firmware: update it — performance fixes and security come together. Enable auto-update unless the vendor's release notes have burned you.
• Reboot monthly: it leaks memory and drifts channels; a scheduled reboot (many routers can self-schedule) prevents the slow Friday-night rot.
• QoS / priority: only turn it on if your line is the bottleneck during video calls while others download, and set it honestly (about 80–90% of your real download speed) — a inflated QoS ceiling does nothing.
• Disable what you don't use: WPS (also a risk — see Security), Universal Plug-and-Play, remote administration. Fewer daemons, fewer surprises.
• Set the radios to modern standards only where possible: forcing 802.11n/ax-only on 2.4 GHz (dropping legacy b/g rates) speeds up everyone on that band, but locks out genuinely old hardware. Test, then commit.

Step 5 — When one router is the problem

No placement or channel makes a single box serve a 250 m² (2700 ft²) two-storey home, brick walls, or a metal roof. That's physics asking for more radios, wired together. The options, in cost order:

Verify, don't vibe

Measure the same way before and after and you'll know what every change did. In one room near the router: the speed test over Ethernet if possible (that's your line's real number — if Wi-Fi beats it, your router is fine), then on Wi-Fi at 5 GHz in the same room, then in the problem room, then on 2.4 GHz only if that's where the trouble is. Note the link speed (what the radio reports) alongside the internet speed (what the line reports): slow internet with fast link speed is an upstream/ISP problem; slow link speed is a Wi-Fi problem. The troubleshooting guide has the full threshold table.

Questions people actually ask

Verified sources & further reading

External links below were live-checked in September 2026. They back up the specific claims on this page; open them and judge for yourself.

1. IEEE 802.11 Working Group — channel plans & PHY specieee802.org
2. DFS channels and radar-vacate behaviouren.wikipedia.org
3. Wi-Fi CERTIFIED 6 — OFDMA and dense-client featureswi-fi.org
4. Wi-Fi 6E — extra spectrum for wide channelsen.wikipedia.org