Why won't my iPhone 4S let me turn on my Wi-Fi?

The thing to turn on the Wi-Fi is all dimmed out and I can't do anything. I've already restored my phone and I still can't turn on the Wi-Fi please help me!

Added (1). & I don't have airplane mode on

If airplane mode is on it won't let you do anything and if you have a password on your internet you will need it.

  • Why won't my iPhone let me turn my volume down? I have an iPhone 5 and when I want to turn my volume down it won't let me. The ringer icon doesn't even show up when I press the volume down button, but it does show up when I press volume up. All the noises and everything on my phone still works but its stuck on high volume and I can't turn it down. This promblem started yesterday
  • Why doesn't my iPhone 4S let me turn on Wi-Fi? It's a 16GB, running iOS 7.1.2. It's like its greyed out. I'd appreciate it if you could help me.
  • My iphone won't let me turn on Wi-Fi? I have an iphone 4s and i can't turn on my Wi-Fi, when i go on the Wi-Fi tab it is just grey and i can't select it to turn it on. How do i fix this? Please help! I tried reseting the network but it still didn't work, please does anyone know how to fix this?
  • My Iphone will only work on charger and won't let me turn on Wi-Fi? Yesterday my iPhone randomly turned off and wouldn't turn back on. Then it finally turned on when I put it on the charger. So when it's on the charger it kind of turns off and back on here and there. But right when I take it off the charger it turns right off. And it will not let me connect to Wi-Fi. Like I'll bring up the Wi-Fi screen and it won't let me switch it from off to on.