@apple_user_2013
Subject: WiFi Greyed Out on iPhone 4s With iOS7
Have, only recently, encountered the greyed out issue after uploading iOS7--this is after almost two years of flawless operation with previous iOS versions.
Yesterday I was referred to my Apple Store by Apple Online Support after I was unsuccessful following Apple Support resolution - Knowledge Base (KB) TS155
In my case I was told that the one (1) year warranty has expired and I have to pay hundreds of dollars to either repair or buy a new smartphone. Man, I was so disappointed---because I suspect that it might be a hardware crash---precipitated, or triggered by upgrading to iOS: 7.1.1?
I think that, possibly, the hardware (part/ component) used in my particular iPhone's assembly---is not compatible with the new iOS 7.1.1?
I'll likely never know for sure because I'm not privy, or have access, to this type of detailed functional testing from either Apple or even a third-party review. To expensive and in my opinion Apple is entitled to their privacy.
I figure that may be the manufacturer (possibly a contract manufacturer) sourcing parts for the Bill of Materials (BoM) may have purchased parts from different vendors and manufacturing dates---and perhaps these component(s)' hardware specifications, tolerances are possibly not reflecting the requirements of the new iOS: 7.1.1? I'm thinking---hardware may include, but not limited, to antenna / transceiver assembly, passive, active, or electromechanical components?
My iPhone Specifications:
Product Type: iPhone4.1
iOS: 7.1.1
Build Version: 11D201
BACKGROUNDER - Apple Support Knowledge Base:
iOS: Wi-Fi settings grayed out or dim
http://support.apple.com/kb/ts1559
Last Modified: May 12, 2014
Symptoms
In rare instances, the setting to turn on Wi-Fi on your iPhone, iPad, or iPod touch may appear grayed out or dim. You might see the following when you tap Settings > Wi-Fi.
If this occurs, your device won't respond when you try to turn Wi-Fi on. If you're using iOS 7.1, "Wi-Fi Not Available" might appear in Control Center.