Why is my Wi-Fi bar grey or dim on my iPhone 4S?

I just got an iPhone 4S from a girl and after I set it all up (it's not on a plan) and the Wi-Fi bar is grey/dim and I can't connect to Wi-Fi anywhere and I can't slide it.

Unfortunattly your device my have a software glich. If you erase all content and settings and restore as a new device, and if they device still won't connect to the Wi-Fi you might need to call into apple and see about a replacement. Iphone 4s if its out of warranty will be 199. If its in warranty it will be covered.

Will a new software update fix it?

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