Can't connect to Wi-Fi on iPhone 4S?

On my phone sometimes Wi-Fi is grayed out and dimmed but sometimes the Wi-Fi will be on but it will no show my Wi-Fi name. Every other apple product in my house will connect to it though. Whenever I tried to do "other" and I'll type in my information but it will say "could not scan for wireless networks" I even did reset all network settings and it will then gray out my Wi-Fi?
Any ideas I can try?

You need to reload a fresh copy of iOS 7. Happens!

Do a fresh install!