How to Re-Log In to a Wi-Fi Network: 7 Methods for All Devices

Have you suddenly discovered that your favorite smartphone, laptop, or smart TV refuses to connect to your home network? Wi-Fi, even though everything was working just yesterday? Or after resetting the router, all devices require you to re-enter the password? This situation is familiar to millions of users—and it's not always related to hardware failure. More often than not, the problem lies in incorrect authorization on a network that can be restored in a few minutes.

In this article we will look at All current methods of re-authorization in Wi-Fi for devices on Android, iOS, Windows/macOS And Smart TV, including cases where the router doesn't provide an IP address or constantly requests a login/password. You'll learn how to bypass common errors like "Authentication failed" or "Invalid network key", even if you've forgotten your network password. For more complex cases, we've prepared a table of method compatibility with different device types.

Why does my device require Wi-Fi re-authorization?

Before we get into the instructions, it's important to understand Why The gadget suddenly "forgot" the network it had been successfully connected to for months. Here are the main reasons:

• 🔄 Resetting the router settings - after pressing the button Reset or firmware update, all devices are automatically disconnected from the network.
• 🔒 Changing your Wi-Fi password — If someone (or you yourself) has changed the security key in the router settings, old devices will not be able to connect.
• ⏳ IP lease expiration — some routers limit the validity period of an IP address (DHCP lease time), and after it expires, re-authentication is required.
• 📱 OS update - after major updates (for example, Android 15 or iOS 18) network settings may be reset.
• 🛡️ MAC address blocking - if the router has a filter enabled MAC, new devices (or those whose MAC has changed) will not be able to connect.

Sometimes the problem lies in software conflictsFor example, antiviruses like Kaspersky or Avast may block network connections, and AndroidOn some devices, the culprit is often "power saving mode," which disables Wi-Fi in the background. Before resorting to drastic measures (like resetting the router), check these points.

⚠️ Attention: If you are connecting to public network (in a cafe, airport, hotel), re-authorization may require passing capture portal (captive portal) — a special page for entering your login/password or confirming via SMS. In this case, simply open your browser and follow the on-screen instructions.

Method 1: Standard re-authorization (for all devices)

The simplest method is delete a network from the device's memory and reconnect to it. This works on 90% of devices and doesn't require any special knowledge. Instructions for different platforms:

📱 Android (all versions, including 15)

1. Open Settings → Wi-Fi.
2. Find your network in the list and tap on it.
3. Select Delete (or Forget the network).
4. Select the network from the list again, enter the password and connect.

🍎 iOS (iPhone/iPad)

1. Go to Settings → Wi-Fi.
2. Click on the blue icon ⓘ near your network.
3. Select Forget this network and confirm.
4. Return to the list of networks, select yours and enter the password.

💻 Windows 10/11

1. Click Win + I, select Network and Internet → Wi-Fi.
2. Click Managing known networks.
3. Find your network and click Forget.
4. Reconnect via the taskbar.

On macOS the path will be like this: System Preferences → Network → Wi-Fi → Advanced, where you need to remove the network from the list and connect again.

Method 2: Authorization via WPS (if the router supports it)

If you don't remember your Wi-Fi password, but your router has a button WPS (usually indicated by the 🔄 icon or WPS), you can connect without entering a key. This method works for most modern routers (TP-Link, ASUS, Keenetic, MikroTik) and devices that support WPS (almost all smartphones and laptops after 2015).

1. Press the button on the router WPS (hold for 2-3 seconds if it is a touch button).
2. On the device:
   • 📱 Android: Settings → Wi-Fi → Advanced → WPS Connection.
   • 💻 Windows: Select a network from the Wi-Fi list, then click Connect using the button.

Wait for automatic connection (usually takes 10-30 seconds).

⚠️ Important: After connecting via WPS Necessarily Check the network password in the router settings (section Wireless Security or Wi-Fi Security). This method is convenient, but unsafe — WPS vulnerabilities allow hackers to brute-force a PIN code in a matter of hours. After authorization, it's best to disable WPS in your router settings.

Why is WPS considered insecure?

The WPS authentication method uses an 8-digit PIN, which can be brute-forced in 4-10 hours. Many routers are vulnerable to this attack. Pixie Dust, allowing you to recover your PIN in seconds. In 2023, experts from Kaspersky recommended disabling WPS on all devices.

Method 3: Manually specifying an IP address (if DHCP does not work)

If after entering the password the device does not receive an IP address (the connection status is hanging Obtaining an IP or Limited), the problem may be in the settings DHCP-router servers. In this case, it will help manual IP configuration.

Instructions for Windows 10/11:

1. Open Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings.
2. Right click on Wireless network → Properties.
3. Select Internet Protocol version 4 (TCP/IPv4) → Properties.
4. Install:
   • IP address: 192.168.1.100 (or another one from your router's range, for example 192.168.0.100)
   • Subnet mask: 255.255.255.0
   • Default gateway: 192.168.1.1 (or 192.168.0.1)
   • DNS: 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare)

Save your settings and reconnect to Wi-Fi.

For Android the path is this: Settings → Wi-Fi → Advanced → Static IP (item names may differ depending on the shell).

⚠️ Attention: If the Internet does not work after manual IP configuration, check Is DHCP enabled on the router?To do this, go to the router's web interface (usually at 192.168.1.1 or 192.168.0.1) and find the section LAN or DHCPMake sure the DHCP server is activated.

Method 4: Authorization via the router's web interface (if you forgot your password)

If you forgot your Wi-Fi password but have access to router web interface, you can find out or change your security key. To do this:

1. Connect to the router via cable (Ethernet) or through another device that remembers the password.
2. Open your browser and enter the router address:
   • 192.168.1.1 (For TP-Link, ASUS, D-Link)
   • 192.168.0.1 (For Zyxel, Tenda)
   • 192.168.8.1 (For Huawei)
   • 192.168.31.1 (for some models Xiaomi)

Enter your login and password to log in (usually admin/admin, if you haven't changed it).

Go to the section Wireless (or Wi-Fi, Wireless network).

Find the field Password, Key or Security key — the current password is displayed here (it may be hidden behind asterisks; click Show).

If necessary, change the password and save the settings.

If you don't remember your router login details, try the standard combinations for your model:

Method 5: Authorization on Smart TV (Samsung, LG, Sony, Xiaomi)

Smart TVs often lose their Wi-Fi connection after a firmware update or a factory reset. The re-authorization process for them differs from that for smartphones and PCs. Let's look at the instructions for popular brands:

📺 Samsung (Tizen OS)

1. Press on the remote control Home → Settings (gear).
2. Select General → Network → Open network settings.
3. Click Wireless network and select your network.
4. Enter your password if the TV asks. IP settings, select Receive automatically.
5. If the network does not connect, try Network reset in the same menu.

📺 LG (webOS)

1. Click Settings (gear) → Net → Connecting to Wi-Fi.
2. Select your network and enter the password.
3. If an error occurs, go to Additional settings and install IP manually (as in Method 3).

📺 Sony (Android TV)

On Sony Bravia With Android TV the process is similar to smartphones:

1. Settings → Network → Wi-Fi.
2. Select a network → Forget.
3. Please reconnect by entering your password.

If the TV doesn't see the network at all, check:

• 📶 Does Wi-Fi work on other devices? If not, the problem is with the router.
• 🔄 Does the TV support your network frequency (for example, 5 GHz may not work on older models).
• 🔌 Is the router connected to the Internet (indicator) WAN should be green).

Method 6: Authorization via MAC filtering (if the router blocks the device)

If the router is configured to MAC address filtering, it will block all devices whose MAC- the addresses are not whitelisted. This is a common cause of authorization issues, especially in office networks. To add a device to the whitelist:

1. Find out MAC address your gadget:
   • 📱 Android: Settings → About phone → General information → Wi-Fi MAC address.
   • 🍎 iOS: Settings → General → About → Wi-Fi Address.
   • 💻 Windows: Run in command line (Win + R → cmd):

     ipconfig /all | findstr "Physical Address"

Go to the router's web interface (as in Method 4).

Find the section MAC Filter, MAC address filter or Wireless Mode → Filter.

Add MAC-Add your device's address to the list of allowed ones.

Save the settings and reboot the router.

If filtering is enabled, but you don't know what addresses are listed in it, you can:

• 🔄 Temporarily disable filtering (set the switch to position Disable).
• 📋 Copy the list of allowed MAC-addresses and add yours there.

⚠️ Attention: In some routers (for example, MikroTik) filter by MAC may be hidden in the section Firewall or Access ControlIf you can't find the setting, check the documentation for your model.

Method 7: Resetting the router (last resort)

If none of the methods helped, and the devices stubbornly refuse to log in to the network, the problem may be in router settingsIn this case it will help full reset to factory settings. Remember: this will remove All personal settings, including Wi-Fi password, port forwarding, and guest networks.

How to reset a router:

1. Find the button on the back of the router. Reset (usually recessed into the body).
2. Take a paper clip or a toothpick and press and hold the button 10-15 seconds (until the indicators blink).
3. After rebooting, the router will return to factory settings.
4. Connect to the network with the factory name (indicated on the sticker) and configure the router again via the web interface.

⚠️ Warning: After the reset you will have to:

• 🔧 Set a new Wi-Fi password.
• 🌐 Re-configure your internet connection (enter your provider's login/password).
• 📡 Reconfigure the guest network, parental controls, and other options.

What should I do if my router doesn't provide internet access after a reset?

Check if the data from the provider is entered correctly in the section WAN or Internet. If you use PPPoE, make sure that the login and password match those specified in the contract. Doma.ru, Rostelecom or MTS This data is usually sent via SMS when connecting.

Common mistakes and their solutions

Even after proper authorization, errors may still occur. Here are the most common ones and how to fix them:

If the error persists, try update the router firmwareTo do this:

1. Download the latest firmware version from the manufacturer's website.
2. Go to the router's web interface, section Update or Firmware.
3. Download the firmware file and wait for the process to complete (do not turn off the router!).

FAQ: Answers to Frequently Asked Questions

🔹 Is it possible to log in to Wi-Fi without a password?

Yes, if:

• 🔄 It's enabled on the router WPS (cm. Method 2).
• 📶 The network is open (no password), but it is not secure.
• 🔑 You've connected to this network before and your device has saved the password (check in your Wi-Fi settings).

In all other cases, a password is required. If you have forgotten it, reset the router or look up the password in its settings (see Method 4).

🔹 Why are some devices unable to connect after changing the router password?

This is normal behavior: all devices that have previously connected to the network, automatically turn off when changing a password. They need:

1. Delete the old network from memory (see Method 1).
2. Reconnect with a new password.

The exception is devices that use a static IP or are bound by MAC-address. They may need to be configured manually.

🔹 How do I log in to Wi-Fi on a device without a screen (like a printer)?

For gadgets without a display (printers, Smart bulbs, IP cameras) use:

• 📄 WPS - press the button on the router and on the device (if supported).
• 🖨️ Special software - for example, for printers HP or Canon There are utilities for setting up Wi-Fi via USB.
• 📱 Mobile application - many smart devices (for example, Xiaomi Mi Home) allow you to connect to their temporary network and transfer data from the main Wi-Fi.

If nothing helps, connect the device via cable (Ethernet) and configure Wi-Fi via the web interface.

🔹 Why does my router ask for a login and password when connecting to Wi-Fi?

This means that it is enabled additional authentication through capture portal (captive portal). This happens in:

• 🏨 Hotel chains (for example, in hotels).
• ☕ Public Wi-Fi (cafes, airports).
• 🏢 Corporate networks with a radius server.

To connect:

1. Open your browser after connecting to the network.
2. You should see a page with fields for entering login/password or a button Accept the terms and conditions.
3. Follow the instructions on the screen.

🔹 Is it possible to log in to Wi-Fi from another device if I don't have access to the router?

Yes, if:

• 📱 Do you have a device that already connected to this network. You can:
• View the password in the Wi-Fi settings (on Android with root rights or through ES File Explorer).
• Generate QR code to connect (on iOS