Eight Wi-Fi myths: foil, extra antennas and the rest

Wi-Fi advice travels well and ages badly. These eight beliefs come up again and again. Each has something true in it, which is exactly why people keep spending money on them.

1. "Foil or a can behind the router boosts the signal"

A sheet of metal does redirect radio waves. It pushes a little more one way and takes it away from another, in a pattern nobody can predict in a furnished room. Sometimes one corner improves and two get worse. If you try it, measure before and after: see testing before and after a change.

2. "More antennas means more range"

Extra antennas mostly let a router talk to several devices at once and carry more data. Range is limited by legal power limits and, above all, by the small radio in your phone, which has to answer back: see router transmit power.

3. "Full bars means fast"

Bars are a rough hint about signal, not speed or stability: see what Wi-Fi bars mean.

4. "A faster plan fixes the weak room"

The plan sets what arrives at the router. A room that gets a trickle of 100 Mbps will get the same trickle of 1,000: see is the provider's router the problem.

5. "Put the extender in the room with no signal"

An extender can only repeat what it hears. In the dead room it hears almost nothing. It belongs halfway: see where to put a mesh node.

6. "5G Wi-Fi is the same as 5G on my phone"

The "5G" in a network name means 5 GHz, a Wi-Fi band. Mobile 5G is the fifth generation of the phone network. The two have nothing to do with each other: see 2.4 GHz or 5 GHz by room.

7. "You should restart the router every night"

A restart clears some temporary faults. A router that needs one daily has a problem worth finding: see does rebooting the router help.

8. "A newer Wi-Fi standard will reach further"

New standards are mainly faster and better with many devices. The newest band, 6 GHz, actually reaches less far through walls: see will Wi-Fi 7 fix dead zones.

The pattern behind all eight

Every myth replaces a question about your home with a product or a trick. The real question is always the same: how does the connection behave in this room? Map it with WiFi Heatmap, change one thing, map it again. That one habit is worth more than any of the eight.