Hi, My name is ***** ***** certified computer professional with over 10 years experience. I will be glad to assist you with this. .I am sorry to hear that you are having this issue.
Try this please... Open the Settings App Choose Wireless and Networks ENABLE Airplane Mode Turn off the phone, then back on Go Back into Wireless and Networks DISABLE Airplane Mode(sometimes listed as Flight Mode). The Radio's will reset themselves and if the issues isnt serious, which it shouldnt be, this will resolve it. Quick note, when you go into Wireless and Networks for the first time, if Airplane/Flight mode is enabled, thats the issue, just disable it.
Does the name of your WiFi network appear in the list of available networks?