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People left fascinated after discovering how aluminum foil improves your Wi-Fi connection

Home> News

Published 12:48 23 Apr 2025 GMT+1

People left fascinated after discovering how aluminum foil improves your Wi-Fi connection

Some users swear by the simple trick

Rebekah Jordan

Rebekah Jordan

Nothing quite ruins your day like bad Wi-Fi.

It's 2025, so the times of buffering whilst streaming your favourite Netflix show or lagging in your Call of Duty lobbies should be long gone. And ever since work-from-home peaked during the Covid-19 pandemic, reliable internet has become more important than ever.

Now, an unexpected Wi-Fi hack is going viral and those who have reportedly tried it are amazed at the results.

A viral post that's racked up almost 60 million views on X claims: "Put an aluminium foil behind your Wi-Fi router and thank me later!!!"

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As weird as it sounds, tonnes of users are swearing by it.

"Amazing what simple alumium foil can do to a Wi-Fi signal. I now have Wi-Fi in my room that doesn't go out every 5 seconds!" one user wrote.

"Brother it just improves the Wi-Fi signal in the direction away from the foil. It's not a tinfoil hat someone is spying on me conspiracy," another added.


Others have been confirming the legitimacy of the hack with the platform's AI bot, Grok. One response from the chatbot read: "Puttin' aluminum foil behind your Wi-Fi router can work! It acts like a signal bouncer, boosting strength up to 55% in one direction, but it ain't a sure thing. Gotta place it just right, or you might mess up other spots."

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So, what's the science behind the trend?

Well, your Wi-Fi router sends signals to your device using electromagnetic waves. By placing aluminium foil behind it, you can reflect and redirect those signals, sort of like how a satellite dish works. The set-up shown in the post appears to be designed to catch signals that would otherwise be wasted at the back.

 In 2017, researches found that using a foil 'reflector' boosted signal strength by up to 55%. (trumzz/Getty)
In 2017, researches found that using a foil 'reflector' boosted signal strength by up to 55%. (trumzz/Getty)

As one user in the comments pointed out: "It may increase signal strength in the forward direction - like a weak DIY directional antenna."

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And if that hasn't convinced you, what researchers discovered in 2017 might.

The team from Dartmouth College and Columbia University used foil to make a 'virtual wall' which could funnel Wi-Fi signals around the house. Something as basic as aluminium was capable of boosting Wi-Fi signal.

In some tests, using a foil 'reflector' boosted signal strength by up to 55% in some areas of the house. However, the catch was that network signal was reduced in other areas as, in the same study, the signal dropped by up to 63% in areas blocked by the foil.

At the end of the day, it's what you consider a bigger loss.

Featured Image Credit: Luis Alvarez via Getty
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