Wi-Fi signal is poor in another room: causes and 12 working solutions

Have you noticed that in one room the internet is flying, while in another, pages take forever to load, videos are lagging, and voice messages take three tries to send? The problem is a weak connection. Wi-Fi signal in remote areas This problem is familiar to many, especially in apartments with thick walls or multi-level buildings. The causes can range from incorrect router settings to physical obstructions—concrete partitions, metal structures, or even a microwave in the kitchen.

In this article we will look at all possible ways to strengthen the signal — from basic (rebooting the router) to advanced (setting up QOS (and channel changes). You'll learn how to identify your network's weak points, which router parameters affect coverage, and when it's time to consider purchasing additional equipment. 90% of problems can be solved without calling a technician—just follow the step-by-step instructions.

Important: If you have dual-band router (supports 2.4 GHz And 5 GHz), the solutions for each range will differ. We'll point out the nuances for both cases.

1. Check the Obvious: 5 Basic Reasons for a Weak Signal

Before digging deep into the settings, rule out simple mistakes that are often overlooked:

• 🔌 The router is turned off or overheatedCheck the indicator lights on the device: if they are flashing erratically or not lit at all, the device may be frozen. Disconnect the power for 30 seconds and then turn it on again.
• 📡 The antennas are pointed incorrectlyIf the router has removable antennas, their position affects the coverage area. When positioned vertically, the signal spreads horizontally (suitable for single-story apartments), while when positioned horizontally, the signal spreads vertically (suitable for two-story homes).
• 🔋 The device is low on batteryLaptops and smartphones automatically reduce power when their battery reaches its last percentage. Wi-Fi adapterTo save energy, connect the device to the power outlet.
• 🚪 Closed doors or furnitureCabinets, metal doors, and even aquariums can block the signal. Try temporarily removing any obstructions.
• 📶 Network congestionIf more than 10 devices are connected to the router, the speed is distributed among them. Disconnect unnecessary devices (for example, old smartphones or smart light bulbs).

If the signal does not improve after these manipulations, move on to more serious measures.

2. Optimize your router's location: the "golden triangle" rules

The installation location of the router determines up to 70% coating qualityMost users place their devices where it's convenient to run cables, not where the signal is optimal. Follow these three rules:

1. Central positionThe router should be located as close to the geometric center of the apartment as possible. For example, in a two-room apartment, the ideal location is the hallway between the rooms.
2. Height 1.5–2 metersThe signal propagates not only sideways but also downwards and upwards. If the router is on the floor, half the signal's power is lost to the neighbors' ceiling.
3. No obstaclesMicrowaves, cordless phones, mirrors, and aquariums can cause interference. Keep your router at least 1 meter away from them.

Try this experiment: Take a smartphone with a network analysis app installed (for example, Wi-Fi Analyzer For Android or NetSpot For iOS) and walk around the apartment. Pay attention to areas where the signal drops below -70 dBm — the coverage there is critically weak.

3. Change your Wi-Fi channel: how to avoid "neighborly" interference

In apartment buildings, neighbors' routers may operate on the same channel, causing interference. It's like trying to listen to the radio when two stations are broadcasting on the same frequency. The solution is to choose the least congested channel.

How to do it:

1. Install a network scanning application on your smartphone (for example, WiFi Analyzer).
2. Run a scan. The app will show you which channels are busy and how busy they are.
3. Select a channel with minimal load (for example, if all the neighbors are sitting on Channel 6, switch to 1st or 11th).
4. Go to your router settings (usually at 192.168.0.1 or 192.168.1.1) and change the channel in the section Wireless Settings.

For the range 5 GHz the principles are the same, but there are more channels (up to 165), and they are less susceptible to interference. However, the signal on 5 GHz It passes through walls worse, so it’s better to leave it for remote rooms 2.4 GHz.

What are DFS channels in 5 GHz?

DFS (Dynamic Frequency Selection) is a channel in the 5 GHz band used by radar and weather services. Routers can occupy these channels, but automatically switch when radar is detected. Not all devices support DFS, so it's best to choose standard channels (36–48, 149–165).

4. Update your router firmware and security settings

Outdated firmware may limit transmission power or contain bugs that affect signal stability. Updating your router's firmware often resolves the issue on its own.

How to update firmware:

• 🖥️ Go to the router control panel (the address is indicated on the device sticker, usually 192.168.0.1 or 192.168.1.1).
• 🔍 Find the section System tools → Software update (names may vary depending on model).
• 📥 Click "Check for updates" and follow the instructions. Do not turn off the power during the process!

Also check your security settings:

- Make sure the network is password protected (open networks are slower due to router limitations).

- Use it WPA2-PSK or WPA3 (outdated WEP reduces speed).

- Turn off the function WPS - It is vulnerable to hacking and can create interference.

⚠️ Attention: If after updating the firmware the router stops turning on, try resetting it to factory settings (button Reset on the back panel). In rare cases, the firmware may crash - then you will need to reflash the device through TFTP server (look for instructions on the manufacturer's website).

5. Set the transmit power and operating mode

Many routers operate at a lower power level by default. This is done to save energy and comply with local regulations (some countries have maximum power limits). Wi-Fi transmitters). However, at home, you can increase the power manually.

How to change settings:

1. Go to your router control panel.
2. Search section Wireless → Advanced Settings (or Wireless network settings → Additionally).
3. Find the parameter Transmit Power (Transmission power). The default is usually 50% or 100%. Install 100% (or High).
4. Save the settings and reboot the router.

Also check the operating mode (Wireless Mode):

- For 2.4 GHz select 802.11n or 802.11b/g/n mixed (the latter provides better compatibility with older devices).

- For 5 GHz use 802.11ac or 802.11a/n/ac mixed.

- If you have Wi-Fi 6 (standard 802.11ax), enable its support for maximum speed.

⚠️ Attention: Increasing the transmit power may result in router overheating, especially if it's stored in a closed cabinet. Monitor the device's temperature (normally up to 60°C). If it overheats, the signal will become unstable.

6. Use repeaters, mesh systems, or additional access points

If you've exhausted all software options and the signal is still weak, it's time to consider hardware solutions. Here are three options, ranging from budget to premium:

• 🔄 Wi-Fi repeaterThe device connects to the main network and distributes it further. Cons: Speed ​​is halved because the extender simultaneously receives and transmits data. Suitable for small apartments.
• 📶 Additional access point (AP). Connects to the router via cable (Ethernet) and creates a separate network. There's no loss of speed, but a wire is required. Ideal for homes with pre-wired connections.
• 🏠 Mesh systemSeveral devices (nodes) operate as a single network, automatically switching between devices. This is the most reliable, but also the most expensive solution.

Comparison of solutions:

If you are choosing a repeater, pay attention to models that support Wi-Fi 6 (For example, TP-Link RE605X or Xiaomi Wi-Fi Range Extender Pro). They work more stably than older devices.

7. Check your equipment: antennas, cables and adapters

Sometimes the problem lies in physical wear and tear of equipment. For example:

• 📡 Router antennas The connectors may have come loose or become damaged. Check that they are tightly tightened (do not overtighten!).
• 🔌 Ethernet cableThe cable coming from the provider may be damaged or poorly crimped. Try replacing it with a new one (categories Cat 5e or higher).
• 💻 The device's Wi-Fi adapter (in your laptop or PC) may be faulty. Connect to the router via cable; if the speed is normal, the problem is with the adapter.

If you have USB Wi-Fi adapter (For example, TP-Link TL-WN725N), try:

1. Connect it to another one USB port (better USB 3.0).
2. Update driver via device Manager (For Windows).
3. Replace the adapter with a model with an external antenna (for example, ASUS USB-AC56).

⚠️ Attention: Cheap Wi-Fi adapters (costing up to 500 rubles) often have weak antennas and overheat. If you use such an adapter for a desktop PC, consider purchasing PCIe cards (For example, TP-Link Archer T6E) - it will give a more stable signal.

8. Alternative solutions: Powerline, 4G router, and other options

If none of the methods help, consider unconventional approaches:

• ⚡ Powerline adaptersThey transmit the internet signal through electrical wiring. You connect one adapter to the router, and the other to a power outlet in the problem room (you can connect it to Wi-Fi hotspot or computer via cable). Speed ​​up to 1 Gbps, but it depends on the quality of the wiring. Popular models: TP-Link AV1000, Devolo Magic 2.
• 📶 4G/5G routerIf your main internet connection is slow and the mobile network in your location is stable, you can use mobile router (For example, Huawei E5788) or USB modem as a backup channel.
• 🔧 Replacing the routerIf your router is more than 5 years old, its hardware may be outdated. Modern models (for example, ASUS RT-AX88U or Keenetic Ultra) support Wi-Fi 6, MU-MIMO And Beamforming, which significantly improves coverage.

Powerline adapters are a good compromise when cable installation is not possible. However, they are sensitive to:

- Old aluminum wiring (speed drops by 2-3 times).

- Surge protectors and UPS (it is better to connect them directly to the socket).

- Large distance between adapters (optimally up to 30 meters).

What is Beamforming?

Beamforming is a technology in which a router focuses the signal toward the connected device rather than dispersing it in all directions. This increases the range and stability of the connection. It is supported by most modern routers (starting with the standard). 802.11ac).

FAQ: Frequently asked questions about weak Wi-Fi in another room

Is it possible to boost Wi-Fi signal using foil or cans?

Theoretically yes: foil or metal mesh placed behind the router antenna can reflect the signal in the desired direction (effect parabolic antenna). However, in practice:

• The gain will be minimal (1–3 dB).
• Incorrect installation may, on the contrary, degrade the signal.
• To achieve a noticeable effect, precise calculations and a large reflector area (at least 30×30 cm) are required.

It's better to spend time optimizing the router's location or purchasing a repeater.

Why does Wi-Fi work poorly at night?

At night, the signal may deteriorate for several reasons:

1. Provider network overloadMany users download large files (torrents, updates), which reduces speed for everyone.
2. Automatic device updatesSmartphones, TVs, and computers often update at night, consuming bandwidth.
3. Interference from neighborsIn the evenings and at night, more people are online, which increases channel congestion.

Solution: Set up QoS (Quality of Service) in the router to prioritize traffic (for example, to give maximum speed to video calls).

How to check whether the router or the ISP is at fault?

Perform two tests:

1. Connect to the router via cable (through Ethernet). If the speed is high, the problem is Wi-FiIf it's low, it's the provider's fault.
2. Reboot your router and connect to it from another device. If the signal is weak on all devices, the problem is with the router or its settings.

Also call your provider and ask if there is accidents or planned work in your area.

Can a smart TV or game console clog Wi-Fi?

Yes. Devices like Samsung Smart TV, PlayStation 5 or Xbox Series X actively use the network:

• TV constantly downloads updates, advertisements, and data for widgets.
• Game consoles download patches (some weighing tens of gigabytes).
• They are often connected by Wi-Fi, rather than via cable, which creates additional load.

Solution: Connect your TV or set-top box to the router via Ethernet (if possible) or customize QoSto limit their background traffic.

Is it worth buying a router with external antennas?

External antennas offer two advantages:

1. Signal directionalityThey can be rotated to enhance coverage in the desired direction.
2. Replacement with more powerful ones. Antennas with gain 5–9 dBi (For example, TP-Link TL-ANT2409A) increase the signal range.

However:

• Most built-in antennas in modern routers are powerful enough for an apartment.
• Installing external antennas requires knowledge (incorrect selection can degrade the signal).

If you have big house (150+ m²), external antennas or a router with their support (for example, ASUS RT-AX86U) will be useful.