Wi-Fi doesn't reach all rooms: Why and how to fix it

Have you noticed that in some rooms, the Wi-Fi sometimes drops out, sometimes works at dial-up speeds from the 90s? Or maybe there's a signal, but pages take forever to load, and video calls stutter constantly? The problem of poor Wi-Fi coverage in an apartment is familiar to many—especially if the router is in the hallway, and the bedroom or kitchen is located behind several walls. In this article, we'll look at the issue. reasons for poor signal and we will give practical solutions, which work in 90% of cases - from free router settings to purchasing additional equipment.

It's important to understand: weak Wi-Fi isn't always the fault of your ISP or an outdated router. More often than not, the problem lies in incorrect placement of the device, interference from neighboring networks, or suboptimal settings. We won't recommend "buying a new router" in the first paragraph—let's try to fix the situation first. without unnecessary expensesAnd if you do need to purchase it, we'll explain which equipment to choose and why.

This article is suitable for both renters who can't afford to drill holes in their walls for cables, and apartment owners who are ready for more serious solutions. All instructions have been tested on routers. TP-Link, ASUS, Keenetic And Xiaomi, but the principles are universal for any model. Let's start with diagnostics—it will help save time and money.

1. Diagnostics: Why Wi-Fi doesn't work in some rooms

Before changing anything, you need to understand the problem. A weak Wi-Fi signal can be caused by:

• 📡 Poor router placement — walls, furniture and household appliances absorb the signal.
• 🔄 Channel overload - if all neighbors are on the same 2.4 GHz channel, the speed drops.
• 📶 Outdated router firmware — software bugs may limit transmission power.
• 🔌 Cable or port faulty — If the problem is only on one device, the Ethernet cable may be to blame.
• 🛠️ Hardware limitations — cheap routers often have weak antennas and low power.

How to check? Take a smartphone with a Wi-Fi analysis app installed (for example, WiFi Analyzer for Android or NetSpot (for iOS) and walk around the apartment. Pay attention to:

• 📊 Signal level (in dBm): from –30 to –60 – excellent, from –60 to –70 – acceptable, below –70 – poor.
• 🔄 Channel congestion: If there are 10 networks on channel 6, it is better to switch to another one.
• 🔗 Connection speed: compare it next to the router and in the “dead zone”.

If the signal is weak on one device only (for example, on a laptop, but not on a phone), the problem may be with its Wi-Fi adapter. If it is weak everywhere — the router or external interference is to blame. And if there's a signal but the speed is low, it's most likely a busy channel or ISP restrictions.

2. Optimizing the router location: where to place it for maximum coverage

A router placed in the corner of a hallway near the floor loses up to 50% of its signal strength due to obstacles. The perfect place for him is - center of the apartment, at a height of 1–2 meters from the floor (for example, on a cabinet or shelf). Avoid the following mistakes:

• 🚫 Near metal objects (refrigerator, microwave, batteries) - they shield the signal.
• 🚫 In closed cabinets or behind thick walls (especially concrete ones).
• 🚫 On the floor or near windows - part of the signal goes outside.

If moving the router to the center of your apartment is not possible (for example, due to the lack of an outlet or network cable), consider these options:

• 🔌 Use extension cord with surge protector (but not the cheap “Chinese” one - it can get hot).
• 🔄 Buy Powerline adapter (transmits internet through electrical wiring) - suitable if the sockets in the apartment are on the same phase.
• 📡 If the router is tied to the ISP's input cable, try using Mesh system or a repeater (more about them below).

It's easy to check the effectiveness of the new location: connect to Wi-Fi in the "problem" room and run a speed test (for example, on Speedtest.net). If the speed has increased by at least 30%, you're on the right track.

⚠️ Attention: If your router is connected via ADSL (telephone cable), moving it far from the phone line will weaken the signal. In this case, it's best to immediately consider extending the line or purchasing a repeater.

3. Router setup: changing the channel, power, and Wi-Fi standard

Even if your router is perfectly positioned, incorrect settings can choke the signal. Access your router's web interface (usually at 192.168.1.1 or 192.168.0.1, login/password — admin/admin, if you haven't changed it) and check these parameters:

a) Selecting the optimal Wi-Fi channel

In the range 2.4 GHz (which penetrates walls better) There are only 13 channels, but they overlap. If all your neighbors are on channel 6, your Wi-Fi will slow down. How to fix:

1. Open the tab Wireless (or Wireless network).
2. In the section Channel select manual mode (Not Auto).
3. Install a channel 1, 6 or 11 - they do not intersect.
4. Save the settings and reboot the router.

For 5 GHz (faster, but passes through walls worse) choose channels with less congestion (check in WiFi Analyzer). Optimal - 36, 40, 44 or 48.

b) Increasing the transmission power

In some routers, you can manually increase the transmitter power (parameter Transmit Power or Tx Power). The optimal value is 100% (or High). But be careful:

• ✅ Increased power can improve coverage, But...
• ⚠️ ...also will increase interference to neighboring networks and will reduce the lifespan of the router.
• ❌ On cheaper models, this setting may be locked.

c) Switching to a modern Wi-Fi standard

If your router supports Wi-Fi 5 (802.11ac) or Wi-Fi 6 (802.11ax), enable it in the settings:

1. Find the section Wireless Mode (or Wireless mode).
2. Select 802.11ac (for 5 GHz) or 802.11n/ac/ax (if there is Wi-Fi 6 support).
3. Disable legacy standards (802.11b), if they are enabled, they slow down the network.

After the changes, don't forget save settings and reboot the router. If some devices stop connecting after this, revert to the default settings. 802.11n (it is supported by all modern gadgets).

4. Using a Wi-Fi repeater: pros and cons

If reconfiguring the router did not help, and there is no way to lay cables, repeater — a simple and inexpensive solution. It connects to your Wi-Fi network and retransmits the signal, increasing the coverage area. However, this method has its nuances:

Pros of a repeater:

• ✅ Easy installation — just plug it into a power outlet and synchronize it with the router.
• ✅ Low price — good models cost from 1,500 to 3,000 rubles.
• ✅ Mobility - can be moved to any outlet.

Disadvantages of a repeater:

• ⚠️ Half speed — the repeater “distributes” the same signal that it receives, so the speed drops by 2 times.
• ⚠️ Additional delay - not suitable for online gaming or video calls.
• ⚠️ Interference — if the repeater is too close or too far from the router, the signal will be unstable.

How to choose a repeater? Focus on:

• 📶 Wi-Fi standard: Take a model with support Wi-Fi 5 (802.11ac) or Wi-Fi 6.
• 🔌 Availability of a power outlet - some models block the second socket.
• 📡 External antennas - improve signal reception.
• 🔄 Mesh support - if you plan to expand the network later.

Top 3 repeaters by price/quality ratio (2026):

1. TP-Link RE605X — Wi-Fi 6 support, speed up to 1.8 Gbps, external antennas.
2. Xiaomi Mi Wi-Fi Range Extender Pro — compact, with Mesh support, price ~2,000 rubles.
3. ASUS RP-AX56 - for gaming PCs, low latency, dual-band.

How to set up a repeater? Let's take this as an example TP-Link RE605X:

1. Plug the repeater into an outlet near the router.
2. Connect to its network (type name) TP-Link_Extender_123).
3. Open your browser and go to the address tplinkrepeater.net.
4. Select your Wi-Fi network and enter the password.
5. Move the repeater to the desired location (where the signal is still there, but weak).

⚠️ Attention: If your speed drops below 10 Mbps after connecting the extender, try moving it closer to your router. The optimal distance is where the router's signal is still stable (at least -65 dBm).

What to do if the repeater does not connect?

1. Check that your router is not using a channel higher than 11 (some repeaters do not support channels 12–13).

2. Disable the "Hide SSID" function on the router - the repeater will not see the hidden network.

3. Reset the repeater to factory settings (Reset button) and repeat the setup.

5. Mesh system: when a repeater fails

If you have a large apartment (100+ m²) or many rooms with thick walls, Mesh system — the best solution. Unlike a repeater, it creates unified network with automatic switching between nodes (router and satellites). Advantages:

• 🌐 One network name - no need to connect to different Wi-Fi when moving around the apartment.
• 🔄 Automatic switching — the device always connects to the strongest signal.
• 📶 Stable speed - no performance drop like with a repeater.
• ⚡ Easy setup — everything is controlled through one application.

Disadvantages of Mesh systems:

• 💰 More expensive than a repeater — the starter kit will cost 5,000–15,000 rubles.
• 🔌 Requires sockets - each node must be connected to power supply.

Popular Mesh Systems (2026):

How to set up a Mesh system? For example TP-Link Deco:

Download the app Deco on your phone|Connect the first node to the router with a cable (or Wi-Fi)|Add the remaining nodes via the app|Place the nodes 10-15 meters apart|Configure the same network name (SSID) for all nodes-->

The mesh system is an ideal option for apartments with concrete walls or multi-level layoutIt's more expensive than a repeater, but it pays for itself with its stability and lack of "dead zones."

6. Alternative solutions: Powerline, cable installation, 4G/5G router

If your Wi-Fi stubbornly refuses to pass through walls and a mesh system is too expensive, consider these options:

a) Powerline adapters: Internet via electrical wiring

These devices transmit the internet signal over electrical wires. It is enough to connect one adapter to the router, and the second one in the problematic room (for example, through TP-Link TL-PA7010P).

Pros:

• ✅ Stable speed (up to 1 Gbps under ideal conditions).
• ✅ No cabling required.

Cons:

• ⚠️ The speed depends on the quality of the wiring (in older houses it may be low).
• ⚠️ Adapters must be on the same phase (otherwise they will not work).

b) Laying the network cable

The most reliable, but labor-intensive way is to stretch it Ethernet cable from the router to the problem room and connect the second router there in mode access points (or bridge).

What you will need:

• 📏 Cable Cat 5e or Cat 6 (length by distance + stock).
• 🔌 Router with access point mode support (e.g. TP-Link TL-WR841N).
• 🛠️ Cable crimping tool (or ready-made "patch cords").

If you can't drill into the walls, use cable channels or skirting boards with a tray.

c) 4G/5G router as a backup option

If the problem is not in the coating, but in low speed from the provider, you can use mobile Internet. Modern 4G/5G routers (for example, Huawei B535) provide speeds of up to 300 Mbps and support up to 64 devices.

When is this relevant:

• 🏡 In a country house where there is no wired internet.
• 📡 If your provider constantly throttles your speed during peak hours.

⚠️ Attention: Before purchasing Powerline adapters, check that your electrical wiring isn't old (aluminum). In houses built before 2000, they may not work or provide low speeds.

7. If all else fails: When is it time to replace your router?

If you have tried all the methods, but Wi-Fi still does not work in some rooms, the problem may be in the router itselfHere are the signs that it's time to change it:

• 🕒 More for the router 5 years - outdated standards (for example, 802.11n) do not provide the required speed.
• 🔥 He overheats or reboots spontaneously.
• 📡 Maximum Wi-Fi speed is lower 100 Mbps (checked on Speedtest.net next to the router).
• 🔄 No support 5 GHz or MU-MIMO (necessary for stable operation of several devices).

Which router should I choose for a large apartment? Please be guided by these parameters:

Top 3 routers for a large apartment (2026):

1. ASUS RT-AX88U Pro — flagship with 8 antennas, speed up to 6 Gbps, AiMesh support (for creating a Mesh network).
2. TP-Link Archer AX73 — optimal in terms of price/quality, Wi-Fi 6, 4 antennas, price ~7,000 rubles.
3. Keenetic Ultra II — Russian brand, excellent firmware, IPTV support.

When choosing a router, pay attention to reviews of the coating - some models (for example, Xiaomi Mi Router 4A) have weak antennas and are not suitable for large apartments.

FAQ: Frequently asked questions about weak Wi-Fi

Is it possible to boost a Wi-Fi signal without buying new equipment?

Yes! Try this first:

1. Move the router to the center of the apartment.
2. Change the Wi-Fi channel to a less busy one (1, 6 or 11 for 2.4 GHz).
3. Update the router firmware.
4. Disable power saving mode on your router (if available).

These measures are free and solve the problem in 50% of cases.

Why does Wi-Fi work poorly only on my phone, but everything is fine on my laptop?

Possible reasons:

• 📱 It's turned on on the phone power saving mode (turns off Wi-Fi in the background).
• 🔄 Outdated firmware Wi-Fi adapter on the phone.
• 📶 The phone only supports 2.4 GHz, and the router operates in mode 5 GHz.

Solution: Check your phone's Wi-Fi settings and update its software.

How can I check if my neighbor is stealing my Wi-Fi?

Go to the router's web interface (usually 192.168.1.1) and find the section DHCP Clients or Connected devicesThere will be a list of all devices currently using your network. If you see an unfamiliar device:

1. Change your Wi-Fi password to a more complex one (at least 12 characters, with numbers and special characters).
2. Turn on MAC address filtering (but this is not a panacea - MAC is easy to counterfeit).
3. Turn it off WPS - This protocol is vulnerable to hacking.

The repeater boosted the signal, but the speed dropped even further. What should I do?

This is normal: repeater retransmits signal, so the speed drops by half. Solutions:

• 🔄 Move the repeater closer to the router (but not too close).
• 📶 Connect the repeater via cable (if the model supports it).
• 🔌 Replace the repeater with Mesh system or access point.

Can I use an old router as a repeater?

Yes, if it supports modes Repeater (repeater) or Client (client). How to set up:

1. Connect the old router to the computer via cable.
2. Go to its settings and find the section Operation Mode (or Opening hours).
3. Select Repeater or Universal Repeater.
4. Enter the SSID and password of your main network.
5. Place the router-repeater in an area with a strong signal reception.

Not all routers support this mode. If not, you can flash it with alternative firmware (for example, DD-WRT), but it's risky.