Wi-Fi won't turn on iPhone 4s?

Hi, I have recently got an Iphone 4s. It was second hand so i restored it to factory settings and it will not connect to the Wi-Fi. I have tried everything, hard reset, turning it on and off and it has still not worked. Is there a way to fix this without going to Apple or Vodafone (the carrier i'm with) ?

I don't think there's really anything else that you can do except for call Apple. It seems like you have exhausted all of your options that I can think of.