wifi do not work in nexus 7

[M BHed]

Hi,
I got a Nexus 7 ,3G ,32G. i set up and ran to the front, I see Home Screen. then threw the SIM card. unfortunately i reset setting factory. so it need set up again, but it is problem that my tablet not found wifi or if find wifi, it dose not work.

Please help me,

 

[Aquila]

Do you mean you can't turn wifi on in the tablet settings or that it just isn't finding your router?

 

[M BHed]

yes. i am on start up. after skip sim card(Set up)