Why the coin-on-router trick ruins your Wi‑Fi signal at home

Many people look for home-made alternatives to fix slow connections in their houses and flats. However, placing metal objects near the device harms the way electromagnetic waves travel. Understanding how the network works at a technical level helps keep the signal steady.

Why does the coin-on-router trick damage your connection?

The well-known idea of putting a metal coin on top of the equipment spread quickly across everyday digital platforms. In practice, this habit stops the internet from being distributed properly around the home because it blocks ventilation and disrupts the antenna’s performance.

Rather than boosting the emitted waves, the metal creates a physical barrier that absorbs and deflects electromagnetic energy. People then experience frequent drops in browsing when they chase quick fixes instead of adjusting the system’s settings correctly.

Related: How to make your internet fly even into the corners of the house?
There’s a simple change in the router settings that increases signal reach without spending money on… Read more.

How do transmission frequencies influence internet speed?

In consumer use, the network typically runs on two different frequencies, and these directly affect connectivity performance. The faster band offers the best overall speed for your package, but it needs modern hardware that supports this advanced technology to work as intended.

By contrast, the lower frequency usually provides greater household range, but with more limited speed. This older option is also prone to instability caused by multiple active signals overlapping and sharing the same physical space in the customer’s home.

Below, watch this official support content carefully to improve your own home: an excellent YouTube video from the Claro Brasil channel that walks through household solutions and explores the points discussed here in more depth.

Which electronic devices interfere with the Wi‑Fi signal?

Many common household equipment items operate using the same wireless transmission frequencies found in homes today. Everyday electronic devices create invisible waves that collide with the stable flow of digital data to computers, interrupting your internet.

Devices with built-in Bluetooth connections can also significantly reduce the performance of the internal network. Temporarily switching off these peripherals often resolves sudden loading problems noticed during video calls or streaming online videos at home.

Domestic Interference Sources Kit

Main signal offenders - These devices operate on the same frequency as the router:

1. Microwave ovens and baby monitors;
2. Cordless phones and neighbours’ modems;
3. Bluetooth devices such as mice and headphones.

Where should you place the device for the best home coverage?

The device’s location within the property is a decisive factor in securing wide, efficient coverage. Residents should choose elevated points with no immediate barriers so the waves can spread without obstruction.

Keeping the router inside closed cupboards or tucked behind televisions greatly reduces range. Wave propagation needs open space to reach the distant rooms where browsing is typically done day to day.

To optimise physical placement and secure the best possible wireless connection experience, follow the guidance recommended by specialist technicians and apply the structural changes listed in this practical home guide:

• Place the equipment in a central area of the property;
• Keep the router in high positions and clear of furniture;
• Follow the vertical or horizontal orientation indicated by the manufacturer.

How do physical barriers affect wireless network performance?

Many common building materials severely reduce the intensity of the signal emitted by the modem. Thick masonry walls and concrete structures create dense blocks that cut internet speed in the rooms farthest from the device.

In addition, decorative items such as glass mirrors and large aquariums filled with water can stop the waves. Avoiding these architectural obstacles improves digital data exchange between devices and provides greater stability for everyday online activities.