Wi-Fi That Matters
The one-sentence version: Wi-Fi problems are almost always about physics (distance, walls, interference) or crowding (too many networks on the same channel) — not about settings tweaks. Fix placement first, channels second, and buy new gear last.
Two-sentence refresher: Wi-Fi is your devices talking to the router over radio instead of cable; SSIDs, bands, and passwords are the basics, covered in the fundamentals guide. This chapter is the practical sequel: making it actually work well.
The bands, in practical terms
Your router probably broadcasts on up to three bands. They're not \"good, better, best\" — they're trade-offs:
| Band | Range through walls | Speed potential | Crowding |
|---|---|---|---|
| 2.4 GHz | Best — goes through walls and floors | Lowest of the three | Worst — everything uses it: neighbors, microwaves, baby monitors, Bluetooth |
| 5 GHz | Decent — one or two walls OK | High | Better — more room, shorter range means less neighbor overlap |
| 6 GHz | Similar to 5 GHz, slightly worse through walls | Highest (on new gear) | Emptiest — but only new devices have 6 GHz radios |
The practical rule: let 2.4 GHz carry the far-away,
low-demand stuff (smart plugs, the thermostat, the garage
camera) and put your laptop and TV on 5 GHz (or 6 GHz if
everything supports it). Most routers do this automatically
with one SSID and \"band steering\" — pushing each device to
the best band it supports. Separate SSIDs per band (Home
and Home-5G) give you manual control; one SSID is less to
manage. Either is fine.
When to care: a device keeps dropping, or speed is fine next to the router and terrible one room over. When not to care: everything works. Don't optimize a network that isn't broken.
Placement beats settings
Radio doesn't go through everything equally. The list that matters, in order of how much they hurt:
- Distance — signal fades with distance, full stop.
- Walls — especially brick, concrete, plaster with metal lath, and mirrors. Drywall is nearly transparent by comparison.
- Metal — filing cabinets, appliances, the router stuffed behind the TV. The router's antennas radiate outward; burying the box buries the signal.
- The floor — routers on the floor in a closet serve the closet. Waist height or higher, out in the open, roughly central in the house.
The one-room test: stand next to the router with your phone and run a speed test; walk to the bad room and run it again. If it collapses, it's the path, not the internet — moving the router (or adding an access point halfway) is the fix. No settings page solves a wall.
Channels: sharing the air politely
Wi-Fi bands are sliced into channels. Nearby networks on the same channel take turns talking — yours waits for the neighbor's, throughput drops. On 2.4 GHz, only channels 1, 6, and 11 don't overlap each other; everything else partially overlaps two of them and is worse than just sharing. On 5 GHz there are many non-overlapping channels, so crowding is rarer.
What to actually do:
- Leave channel selection on Auto unless you have a measured problem. Modern routers scan and pick reasonably.
- If 2.4 GHz is slow and a Wi-Fi analyzer app shows neighbors piled on your channel, try manually setting 1, 6, or 11 — whichever is least used around you. (Analyzer apps are free on every phone OS; they show a graph of nearby networks per channel.)
- Don't chase \"the empty channel\" on 2.4 GHz between the big three — overlapping two busy channels is worse than sharing one.
A note on \"Wi-Fi 6/6E/7\": these are generations of the standard (6E adds the 6 GHz band; 7 is the newest). A new standard helps most in crowded airspace and with many devices; it doesn't punch through your brick wall any better. Upgrade the standard when you have dozens of devices fighting, not when one room is dead — that's a placement problem.
Wired beats wireless, every time
The unglamorous truth behind every \"my Wi-Fi is slow\" story: anything that doesn't move should be on a cable. TV, desktop PC, game console, the NAS — a $15 cable gives each of them full speed, zero interference, and removes them from the air, leaving more room for the phones and laptops that actually need wireless. Powerline adapters (networking over your house wiring) are a distant second — they work, but speeds vary wildly with your wiring. Mesh systems (multiple units repeating the signal) fix dead rooms at the cost of halving-ish throughput per hop; they're a placement solution wearing a product box.
The 80/20 checklist
In order, stop when it's good enough:
- Router out in the open, central, off the floor.
- Stationary devices on ethernet.
- Phones/laptops on 5 GHz; IoT on 2.4 GHz.
- 2.4 GHz channel set to the least-crowded of 1, 6, 11 — only if measured slow.
- Dead room persists → access point or mesh node halfway between, wired back to the router if at all possible.
If you've done all five and one room is still bad, that's a wiring-or-construction problem, not a Wi-Fi problem — and no router upgrade fixes construction.
Next: Remote Access, Compared