Are you trying to connect to other WiFi networks or your own? Is phone's WiFi turned on? Are you sure there are hotspots near you? Is Network notification checked under advanced options in WiFi?
If it's home network, did you double check your phone's WiFi settings? Did you double check your settings/security on the router? Did you limit users? MAC addresses, etc?
Too many things to consider and troubleshoot. What exactly is your issue (more details please).