To log in to your Netgear router extender, ensure it's powered on and connected to your existing Wi-Fi network. Use a device connected to the extender's network or directly via Ethernet. Open a web browser and enter "mywifiext.net" or "192.168.1.250" in the address bar. Enter your username and password (default is typically "admin" and "password"). Once logged in, you can manage settings, update firmware, and optimize performance. For detailed guidance, visit the Netgear Router Extender Login page or refer to the product manual for troubleshooting and additional configuration options.