1. Connect your phone, tablet, or computer to the router's WiFi network. If you're using a computer, you can connect over WiFi or plug an Ethernet cable into one of the router's LAN ports.
2. Open a web browser on your phone, tablet, or computer. Type 192.168.2.1 into the address bar, then tap “Go” or press Enter.
If you are using a Telekom Speedport router, such as the Speedport Smart 4, you can also try entering speedport.ip to open the router login page.
Make sure you enter the login address in your browser's address bar. Don't type it into the Google, Bing, or another search engine's search box.

3. Wait for the router login page to open. If you see a message like “This site can't be reached”, check that your device is connected to this router's WiFi network. Then reopen your browser and try accessing the 192.168.2.1 login page again.
4. Once the login page opens, enter the router's admin password, then click the “Login” button. This will redirect to the router admin page, where you can change the WiFi password and adjust network settings.
Belkin router login page:

Telekom Speedport login page:

The default admin password is often admin. If it doesn't work or you see an incorrect password message, check the label on your router for the default password.
If you created a new admin password when you first set up the router, use that password to log in to the router settings page.