>connect your cellphone with the extender's network(make sure your cell phone should be a smartphone)
>open the web browser and type this address:- https://extender.linksys.com or 192.168.1.1
>click on start button
>now follow the instructions and complete the setup process
and once your extender is configured ,after that extender is ready to use.
or we can also configure through wps method:-
press and hold the wps button from the extender for atleast 3 seconds and within 2 minutes press and hold the wps button from the router for atleast 3 seconds
and then wait for the lights to get stable.