Check the Wi-Fi password on the router label
Ask the network owner for the password
Use your phone’s saved Wi-Fi passwords if you already connected before
On Android, open Wi-Fi settings and view saved networks if your device supports it
On iPhone, check saved Wi-Fi passwords in Settings if your iOS version supports it
Use a trusted password manager if you stored it there
Log in to the router admin page if you have permission
Reset the router if you own it and need to set a new password