Open a web browser and enter your router’s IP address in the address bar (commonly 192.168.0.1 or 192.168.1.1)
Log in with your router username and password (check the router label or documentation if needed)
Find the section for Wireless/Wi‑Fi settings (sometimes named WLAN or Wi‑Fi Setup)
Select the network you want to change (2.4 GHz, 5 GHz, or both)
Locate the Wi‑Fi Password field (often labeled WPA/WPA2 Passphrase or Wi‑Fi Key)
Enter the new Wi‑Fi password
Save or Apply the changes
Wait for the router to restart (if prompted)
Reconnect your devices to the Wi‑Fi using the new password