My iPhone 4 ios5 has suddenly stopped giving me the option to join any wifi network. The 'wifi' line in settings has gone grey and does not respond to touch. How can I get it back? AW

My iPhone 4S ios5 has suddenly stopped letting me connect to any wifi. The wifi line in settings has gone grey, reads 'no wifi' and does not respond to touch. How do I get reconnected?

HI there,
You may want take a look at some of the troubleshooting steps found in the article below.
iOS: Wi-Fi settings grayed out or dim
http://support.apple.com/kb/ts1559
Hope that helps,
Griff W.

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