What should I do if I cannot access www.mywifiext.net to set up my extender?

First, make sure your computer or mobile device is connected to the extender's WiFi network and the Device LED is solid green or amber. Try entering the extender's default IP address (192.168.1.250) in your browser. If that doesn't work, find your extender's IP address by logging into your router and checking the list of attached devices. You can also try clearing your browser's cache and browsing history, using a different browser, or assigning a static IP address to your computer (192.168.1.249 with subnet mask 255.255.255.0).