Current Events > oh geez. my 5.0 ghz wifi network is like 80mbps, but 2.4ghz is like 0.5mbps

(+) Yeah! (+)

what the hell is causing all this interference?

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It can be many things.
Cellphones, cordless telephones, baby monitors, bluetooth, car alarms, microwave ovens, video senders, amateur radio, wireless microphones, etc all uses the 2.4 GHz band.
If you really want to know exactly what, you can get a spectrum analyzer and try to find it.
Changing the Channel on your WiFi network might help you.

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Foppe posted...

It can be many things.
Cellphones, cordless telephones, baby monitors, bluetooth, car alarms, microwave ovens, video senders, amateur radio, wireless microphones, etc all uses the 2.4 GHz band.
If you really want to know exactly what, you can get a spectrum analyzer and try to find it.
Changing the Channel on your WiFi network might help you.

Problem is that 2.4Ghz is saturated as fuck, so changing channels probably won't amount to much.

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Use the "WiFi Analyzer" phone app to walk around and figure out what signals are coming from where.

https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer&hl=en_US

With many WiFi Routers that don't have external Antenna, make sure you figure how the internal Antenna is oriented and adjust the positioning of the Router so that it emits the signal in the optimum direction.

https://www.techadvisor.co.uk/cmsdata/features/3593058/wifi-antenaae-position.jpg

But imagine how fixed antenna angles are when they are hidden in the body of your WiFi Router. Then adjust the orientation of the router to best fix the emission lobes for better strength / coverage.

Also, less walls / barriers in the way of your WiFi Router will help you out, so optimize the placement of the WiFi Router.

Also consider DD-WRT or other open source WiFi Router firmware if your current default OEM Firmware is giving you crap performance.

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noonas are blocking your signal