"Can't connect to this Wi-Fi network": all the reasons and how to fix it

Message "We can't connect to this Wi-Fi network." can appear on any device - from a smartphone Samsung Galaxy S23 to the laptop with Windows 11 or TV LG OLED C2Most often, the problem lies not in a faulty device, but in network settings, a protocol conflict, or a simple authentication error. But how can you accurately determine the cause and fix it without calling a technician?

In this article we will look at all possible scenarios — from simple (for example, an incorrect password) to complex (incompatibility of standards Wi-Fi 6E and legacy devices). You will learn how to diagnose the problem on router, device and even at the level provider, and also receive checklists for quick solutions. We will pay special attention to cases where one device does not connect, and the rest work fine - this is the most common and insidious option.

⚠️ Attention: If you see the message Obtaining IP address... followed by a failure is a separate type of problem associated with DHCP serverWe will also consider its solutions, but in a separate section.

1. Check the obvious: password, airplane mode, and physical connections

Start with the basics - 9 out of 10 problems are resolved at this stage. Even if you are sure that the password is entered correctly, double-check it. Users often confuse the case of letters (W And w), symbols (1 And l) or copy the password with spaces at the end.

Another common mistake is airplane mode or a disabled Wi-Fi adapter. Windows Check the network icon in the tray: if it is crossed out or shows an airplane, turn on Wi-Fi with the combination Fn + F2 (or another key, depending on the laptop model). Android And iOS Swipe down from the top of the screen and make sure the Wi-Fi icon is highlighted.

Don't ignore and physical connections:

• 🔌 Router: Check if the power and Wi-Fi indicator is on. If it's blinking orange, reboot the device using the button. Reset (not to be confused with a full reset!).
• 📶 Antennas: on dual-band routers (for example, ASUS RT-AX88U) Make sure the antennas are connected to the ports 5 GHz And 2.4 GHz That's right - sometimes they are marked with colors.
• 🔄 Cables: if the Internet goes through PON terminal (like Rostelecom), check if the cable has fallen out of the port. LAN1.

⚠️ Attention: If the router gives an error No Internet (no network access), but Wi-Fi is working—the problem is with your provider. Call support and check if they're currently performing maintenance. Hotline numbers are usually listed on a sticker on the back of the router.

2. Wi-Fi Standards Conflict: 2.4 GHz vs. 5 GHz vs. 6 GHz

Modern routers (for example, TP-Link Archer AX73 or Keenetic Ultra) work in three ranges:

- 2.4 GHz — long-distance, but overloaded (interfering with neighbors, microwaves, Bluetooth devices).

- 5 GHz - fast, but with a shorter range.

- 6 GHz (Wi-Fi 6E) is new, but only supported by devices after 2021 (iPhone 13+, Samsung Galaxy S21+).

If your device doesn't see the 5 GHz network or does not connect to it, the reasons may be as follows:

• 📱 Legacy adapter: laptops before 2015 (for example, Lenovo ThinkPad T440) are often not supported 802.11ac (5 GHz). Check model specifications.
• ⚙️ The range is disabled in the router: go to the control panel (usually 192.168.1.1) and make sure 5 GHz is enabled in the section Wireless → Basic Settings.
• 🔒 Hidden network: some routers (for example, Zyxel Keenetic) hide the SSID for 5 GHz by default. Enable visibility.

For diagnostics on Windows open Command line (Win + R → cmd) and enter:

netsh wlan show drivers

Look for the line Supported Radio TypesIf only there 802.11b/g - Your adapter does not support 5 GHz.

3. Authentication errors: Incorrect security type

Message "Can't connect to this network" often appears due to incompatibility of encryption methods. For example:

- The router is configured to WPA3, and the old device (for example, iPhone 6) supports only WPA2.

- It is used on the network 802.1X (enterprise), but the device does not have a certificate installed.

To check your security settings:

1. Go to the router panel (192.168.0.1 or 192.168.1.1).
2. Go to the section Wireless → Security (or Wireless Network → Security).
3. Make sure it is selected WPA2-PSK (AES) - this is the most compatible option.

If you have dual-band router, security settings may differ for 2.4 GHz and 5 GHz. For example, on TP-Link Archer C6 by default 5 GHz operates in mode WPA2/WPA3, which causes problems with older gadgets. Solution: Force WPA2 on both networks.

⚠️ Attention: If selected in the router settings TKIP (instead of AES), the network will be vulnerable to attacks, and the speed will drop to 54 Mbps. Always use AES.

4. DHCP Issues: "Obtaining IP Address" and Endless Connection

If the device gets stuck at the "Obtaining IP address" stage, I'm guilty DHCP server — a service that automatically assigns IP addresses on the network. Reasons:

- DHCP overload: too many devices are connected (for example, in an office).

- IP conflict: two devices received the same address.

- Disabled DHCP: a static IP has been manually entered that conflicts with the network.

How to fix:

• 🔄 Restart DHCP: on Windows perform in Command line:

  ipconfig /release
  ipconfig /renew

• 📱 On Android/iOS: Forget the network (Settings → Wi-Fi → [network] → Forget) and reconnect.
• ⚙️ On the router: Check if DHCP is enabled in the section LAN → DHCP ServerThe address range should be, for example, 192.168.1.100–192.168.1.200.

If the problem persists, appoint static IP manually:

1. On Windows: Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings.
2. Right-click on your Wi-Fi → Properties → Internet Protocol Version 4 (TCP/IPv4).
3. Select Use the following IP address and enter:

   IP: 192.168.1.99
   Mask: 255.255.255.0
   Gateway: 192.168.1.1
   DNS: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare)

What to do if a static IP doesn't help?

If the connection still doesn't work after assigning a static IP, check:

- Is this IP already occupied by another device (for example, via ping 192.168.1.99 (in the command line).

- Is the gateway specified correctly (it must match the router IP, for example 192.168.0.1 or 192.168.1.1).

- Does the antivirus (for example) block it? Kaspersky or ESET) network connection.

5. Device-level issues: drivers, settings, viruses

If only one device If your Wi-Fi connection isn't working, but other devices are working fine, look for the problem there. Let's look at some typical scenarios:

On Windows:

• 🖥️ Outdated drivers: open device Manager (Win + X → Device Manager), find Network adapters and update the driver for your Wi-Fi module (for example, Intel AX200 or Qualcomm Atheros).
• 🛡️ Firewall or antivirus: temporarily disable Windows Defender or a third-party antivirus (for example, Avast).
• ⚡ Energy Saving: in the adapter properties (Device Manager → Network Adapters → [your adapter] → Power Management) uncheck Allow the computer to turn off this device to save power.

On Android/iOS:

• 📲 Reset network settings: on Android go to Settings → System → Reset → Reset Wi-Fi, mobile network, and Bluetooth settingsOn . iPhone: Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings.
• 🔄 Modem mode: If you recently updated your firmware, try turning it on and off Modem mode in the settings.

On Smart TV:

• 📺 Factory reset: on Samsung QLED or LG OLED go to Settings → Support → Reset and select Reset network settings.
• 🔌 Ethernet problems: If the TV is connected to the router via cable, but Wi-Fi is not working, check whether the wireless module is disabled in the service menu (accessible by the button) Mute → 1 → 8 → 2 → Power on the remote controls Samsung).

⚠️ Attention: On some devices (eg. Xiaomi Mi Box or Amazon Fire TV StickAfter resetting the network, you may need to reactivate it through the smartphone app. Please have a second device with internet access ready.

6. External interference and signal problems

Weak signal or interference may cause constant connection breaks or complete inability to connect. Check:

- Distance to the router: If you are at the edge of the coverage area (for example, in another room with concrete walls), the 5 GHz signal may not reach you.

- Channel congestion: In apartment buildings, 2.4 GHz channels are often overloaded. Use apps like Wi-Fi Analyzer (Android) or NetSpot (macOS/Windows) for analysis.

- Sources of interference: microwaves, wireless cameras, Bluetooth speakers (JBL, Sony) operate at a frequency of 2.4 GHz and can jam the signal.

How to improve the signal:

• 📡 Change the channel: in the router settings (Wireless → Channel) select the least loaded channel (for example, 6 or 11 for 2.4 GHz). For 5 GHz use 36–48 or 149–165.
• 🔗 Use the Mesh system: If your router doesn't cover the entire area, consider mesh solutions like TP-Link Deco or Google Nest Wi-Fi.
• 📶 Adjust the transmit power: on some routers (for example, ASUS RT-AX86U) you can increase the power in Professional → Transmit Power (but this may violate the laws of your country!).

To check the signal level on Windows execute:

netsh wlan show interfaces

Look for the line SignalIf the value is lower 60%, the signal is weak.

7. Problems with the provider: blocking, restrictions, technical work

Sometimes the problem isn't with your hardware, but with Internet providerTypical scenarios:

- MAC address blocking: some providers (eg Beeline or MTS) bind access to the router's MAC address. If you change your router, the internet won't work.

- Device restrictions: The tariff may include a limit on the number of connected gadgets (relevant for public networks in hotels or cafes).

- Technical work: The ISP may temporarily disable the DHCP service or change the authorization settings (for example, PPPoE on Dynamic IP).

How to check:

1. Connect your ISP's cable directly to your PC/laptop (bypassing the router). If the internet works, the problem is with the router.
2. Call support and clarify:
   • Have the connection settings (login/password for PPPoE, VLAN ID).
   • Is your router blocked by MAC address?
   • Are there any restrictions on the number of devices?

⚠️ Attention: If the provider uses MAC binding, and you changed your router, you will either have to call support to re-register, or clone the MAC address of the old router in the new one (option MAC Clone in WAN settings).

8. Hardware malfunctions: when it’s time to take it in for repair

If none of the above helps, it is possible hardware failure:

- The Wi-Fi module burned out in the router or device (for example, after a power surge).

- The antenna is damaged (especially relevant for routers with external antennas, for example, TP-Link Archer C5400).

- Problems with ports (for example, the port is not working 5 GHz on a dual-band router).

How to diagnose:

• 🔍 Check the indicators: If the Wi-Fi light on the router is not on or is blinking red, the module is faulty.
• 🔌 Connect another device: If none of your devices connect to the router, the problem is with the router. If only one device doesn't connect, its Wi-Fi module is faulty.
• 📡 Test with another router: borrow a working router from your friends (for example, Xiaomi Mi Router 4A) and check if your device connects to it.

Repair cost:

• Replacing the Wi-Fi module in the router: 1 500–3 000 ₽ (depending on the model).
• Antenna replacement: 500–1 500 ₽.
• Laptop Wi-Fi Repair: 2 000–5 000 ₽ (for example, replacing a module Intel AX201 V Lenovo ThinkPad).

⚠️ Attention: If the router gives an error WAN port disconnected or does not respond to reset (Reset), do not attempt to disassemble it yourself—this may void the warranty. Contact a service center.

FAQ: Frequently asked questions about connecting to Wi-Fi

Why does my phone connect to Wi-Fi, but the internet doesn't work?

This is a typical problem with DNS or gateway. Try:

1. On Android: Go to Wi-Fi settings, tap on your network → Change Network → Advanced → IP Settings (Static) and enter DNS 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).
2. On iPhone: Settings → Wi-Fi → [network] → Configure DNS → Manually and add the same addresses.
3. Reboot your router - sometimes providers change the default gateway.

How to connect to Wi-Fi if you forgot the password?

There are several ways:

• 🖥️ On Windows: open Command line and enter:

  netsh wlan show profile name="[network name]" key=clear

  The password will be in the line Key Content.

• 📱 On Android: If the device is already connected to the network, use the app WiFi Password Viewer (root rights required).
• ⚙️ Via router: go to control panel (192.168.1.1) and look at the password in the section Wireless → Security.

Why does Wi-Fi work on my phone but not on my laptop?

This is a typical case. incompatibility of standards or problems with drivers. Check:

1. Does the laptop support 5 GHz (if the router only distributes this range).
2. Update your Wi-Fi adapter driver via device Manager.
3. Temporarily disable your antivirus (for example, Avast or Dr.Web) - it can block the connection.
4. Try connecting to the network 2.4 GHz (if the router is dual-band).

What should I do if my router doesn't distribute Wi-Fi after a reset?

After reset (Reset) the router is reset to factory settings. You need to:

1. Connect to it via cable or Wi-Fi with the default name (usually indicated on the sticker, for example, TP-Link_1234).
2. Go to the control panel (192.168.0.1 or 192.168.1.1) and go through Quick Setup (quick setup).
3. Enter your provider data (login/password for PPPoE, if required).
4. Set up network name (SSID) and password.

If the router doesn't turn on or blinks red after a reset, the firmware may have crashed. In this case, you'll need to reflash it. TFTP (instructions are available on the manufacturer's website).

Is it possible to connect to Wi-Fi without a password?

Technically yes, but this violates the law on unauthorized access (Article 272 of the Russian Criminal Code). However, there are legal ways:

• 🔑 WPS: if the router supports WPS, press the button WPS on your router, and then select this option on your device (not available on all models).
• 📱 QR code: some routers (for example, Huawei WS5200) generate a QR code to connect without entering a password.
• 🤝 Guest network: Ask the network owner to create guest access with a separate password.

⚠️ Attention: Connecting to someone else's network without permission is an offense and may result in administrative or criminal liability.