How to change the Wi-Fi password on a TP-Link router via phone: instructions with pictures

Forgot your home Wi-Fi password or want to update it for security? With routers TP-Link This can be done directly from your phone—no computer or extra wires required. In 2026, the manufacturer simplified the process: now even a novice can set up a new network in just 5 minutes via a mobile app. Tether or web interface.

We will analyze both methods (with the application and through the browser), and point out typical mistakes when changing the password on models Archer C6, TL-WR840N or Deco M4We'll also explain why new settings sometimes don't apply. Finally, we'll provide an FAQ with answers to questions about compatibility, security, and resetting your router to factory settings.

Important: If you change your password because you suspect your network has been hacked, be sure to check the list of connected devices in the Settings → Wireless → Wi-Fi ClientsUnknown gadgets should be blocked.

1. Preparing to change your password: what to check before you start

Before accessing your router settings, make sure that:

• 📶 Your phone is connected to a Wi-Fi network exactly that routerwhose password you want to change. If you've already disconnected, reconnect or use mobile data (but you'll need the router's IP address).
• 🔋 The router is plugged in and the power indicator is on. green (On some models, blue). A flashing orange light indicates problems connecting to your ISP.
• 📱 The app is installed on the phone TP-Link Tether (for Android/iOS) or any browser (Chrome, Safari). The app is more reliable—it automatically finds the router on the local network.

If you use TP-Link Deco (mesh system), please note: changing the password will cause a brief disconnection between satellites (10-20 seconds). All devices will automatically reconnect to the network with the new password.

⚠️ Please note: If your router is provided by a provider (such as Rostelecom or Beeline), its web interface may be blocked. In this case, you can only change your Wi-Fi password through your provider's personal account.

2. Method 1: Change your password via the TP-Link Tether app

Mobile application Tether — the easiest way to control your router from your phone. It supports most models. TP-Link, including Archer AX20, TL-WR940N And Deco X20. Download it:

• 🤖 Android: Google Play
• 🍎 iOS: App Store

After installation:

1. Open Tether and allow access to the local network (if requested).
2. The app will automatically find your router. Click on its name (for example, TP-Link_1234).
3. Enter the current Wi-Fi password (if requested) or the admin login/password (usually admin/admin, if you haven't changed it).
4. Go to the section Settings → Wireless (Wi-Fi).
5. Click on the field Wi-Fi password, enter a new one (minimum 8 characters, we recommend using letters, numbers and symbols like ! or #).
6. Save the changes by clicking the button OK or Apply.

The router will reboot (this will take about 30 seconds). All devices will be disconnected from the network and will need to be reconnected with a new password.

The new password is written down on paper or in notes|

The password contains capital letters and numbers|

No one in the household uses the network for important tasks (for example, video calls)|

The router does not blink red (no connection errors)

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⚠️ Important: If you lose internet access after changing your password, check to see if your ISP connection settings have been reset. This can happen if you manually change the settings in the Settings section. Network → WAN.

3. Method 2: Change your password through a browser on your phone

If the application Tether If your router isn't found or you prefer a web interface, use a browser. This guide is suitable for TP-Link any models, including old ones TL-WR740N or TL-WR841N.

Steps:

1. Open your browser (Chrome, Safari) and enter in the address bar tplinkwifi.net or the IP address of the router (usually 192.168.0.1 or 192.168.1.1).
2. Enter your login and password to log in (default - admin/admin, if you haven't changed it). If it doesn't work, reset the router using the button. Reset (press and hold it for 10 seconds).
3. Go to the section Wireless → Wireless Settings (on English firmware - Wireless → Wireless Settings).
4. In the field PSK password (Wireless Password) Enter a new password. For security, select the encryption type. WPA2-PSK (or WPA3-PSK, if supported).
5. Click Save (Save). The router will reboot.

If the changes are not applied after saving, try:

• 🔄 Refresh your browser page (sometimes the cache prevents new settings from displaying).
• 📱 Reconnect your phone to Wi-Fi with a new password.
• 🔌 Restart the router using the power button.

What should I do if tplinkwifi.net won't open?

If the address tplinkwifi.net does not work, check:

1. Is the phone connected to the router's Wi-Fi (not to mobile data).

2. Does your browser block access to local IP addresses (try incognito mode).

3. Has the router's IP changed (you can find out through the application) Fing on the phone).

4. Is the DHCP server disabled in the router settings (then you will have to assign the IP manually).

4. Optimal security settings for Wi-Fi on TP-Link

Changing your password is only half the battle. To prevent your network from being hacked, check these settings:

• 🔒 Encryption type: use WPA2-PSK (or WPA3-PSK, if the router supports it). Outdated WEP hacked in minutes.
• 📡 Network name (SSID): Do not use personal information (eg. Ivanov_kv5). A neutral name like HomeNet_2.4G.
• 🔄 Guest network: If you often have guests, create a separate network with limited access to local devices (Guest Network → Enable).
• 📵 Hiding the SSID: disable the option Hide SSID - it does not improve security, but it makes connecting new devices more difficult.

A critical mistake many users make is using simple passwords like "12345678" or "qwerty." Such combinations can be brute-forced in a matter of hours. The optimal password is 12+ characters long, with a mix of uppercase, lowercase, and special characters (e.g., Green$Tree91!Moscow).

5. Common mistakes and how to fix them

Even if you follow the instructions correctly, problems can arise. Let's look at some typical ones:

Error 1: "Incorrect password" when accessing router settings

If you've never changed your login information, try:

• Login: admin, password: admin (for most models).
• Login: admin, password: empty (for old routers).
• If it doesn't work, reset the settings using the button Reset (press it with a paper clip for 10-15 seconds).

Error 2: After changing the password, the Internet disappeared.

Possible reasons:

• The connection settings to the provider have been lost (check the section Network → WAN).
• The DHCP server is disabled (enable it in DHCP → DHCP Settings).
• The router is frozen during reboot (turn off the power for 30 seconds).

Error 3: New devices won't connect to Wi-Fi

Most often this happens due to:

• Typos in the new password (check the case!).
• MAC address restrictions (disable in Wireless Mode → MAC Filter).
• Incompatibility of Wi-Fi standards (for example, an old laptop does not support Wi-Fi 6). Try enabling compatibility mode. 802.11b/g/n.

6. How to reset a TP-Link router to factory settings

If you have forgotten both your Wi-Fi password and your router login details, the only thing left to do is full resetThis will reset all settings to factory defaults, including the network name and password (they are located on the sticker on the bottom of the router).

Instructions:

1. Find the small button on the back of the router. Reset (sometimes it is recessed and requires a paper clip).
2. Press and hold it 10-15 seconds (until the indicators start flashing or go out).
3. Release the button and wait for the reboot (1-2 minutes).
4. Connect to a Wi-Fi network with the factory name (for example, TP-Link_1234) and password (indicated on the sticker).

After reset:

• 🔧 Reset your internet connection (your provider's details are usually included in your contract).
• 🔒 Immediately change the password for Wi-Fi and the admin panel (section System Tools → Password).
• 📡 Update your router firmware (if a new version is available).

⚠️ Note: On some models TP-Link Deco the reset is performed through the application Deco. Press and hold the button Reset for 5 seconds - the system will offer to reset only one satellite or the entire mesh network.

7. Additional settings: how to improve Wi-Fi after changing your password

While you're in the router settings, it's worth optimizing other parameters for stable network operation:

1. Selecting a Wi-Fi channel

If neighbors are using the same channels, interference may occur. Check channel occupancy using the app. Wi-Fi Analyzer (Android) and select the most free one in the router settings (Wireless Mode → Channel). For 2.4 GHz, we recommend channels 1, 6 or 11 (they do not intersect).

2. Transmission power

In city apartments, high power can cause interference. Set the value Average or Low V Wireless Mode → Transmission Power.

3. Separation of 2.4 GHz and 5 GHz frequencies

If your router is dual-band (for example, Archer C20), give the networks different names (for example, HomeNet_2G And HomeNet_5G). This will make it easier to connect devices to the required frequency.

4. Firmware update

Outdated software may contain vulnerabilities. Check your firmware is up to date. System Tools → Software UpdateIf a new version is available, update (do not turn off the power during the process!).

How do I know if my router supports Wi-Fi 6?

Look at the router model:

- If the title contains AX (For example, Archer AX10) - supports Wi-Fi 6.

- If only AC (For example, Archer C50) - This Wi-Fi 5.

- Models with N (For example, TL-WR841N) — Wi-Fi 4.

FAQ: Answers to Frequently Asked Questions

Is it possible to change the Wi-Fi password without connecting to the router?

No, you need to be connected to the router's network (via Wi-Fi or cable) to change your password. The exception is if you use mobile internet and know the router's IP address on the local network (for example, 192.168.0.1). But even in this case, access to settings requires authentication.

Why don't some devices connect after changing the password?

Possible reasons:

• The device stores the old password in memory (delete the network in its settings and connect again).
• The selected encryption type is not supported (try WPA2-PSK instead of WPA3).
• The MAC address filter is enabled on the router (disable it or add the device's MAC address to the whitelist).

How do I know who is connected to my Wi-Fi?

Go to the router's web interface (tplinkwifi.net) and go to Wireless Mode → Wi-Fi ClientsA list of devices with their IP and MAC addresses will be displayed. Unknown devices can be blocked using the button. Block.

What should I do if I forgot my router admin panel password?

The only way is to reset the router to factory settings using the button ResetAfter this, the login data will become standard (admin/admin), but all personal settings (including the Wi-Fi password) will be erased.

Is this guide suitable for TP-Link Deco routers?

Yes, but with nuances:

• For Deco use the app TP-Link Deco (Not Tether).
• Changing the password applies to the entire mesh network automatically.
• In the web interface Deco another address: deco.tplinkra.com.