http://www.apple.com/ios/ (iOS 7) iOS is the foundation of iPhone, iPad, and iPod touch. It comes with a collection of apps that let you do the everyday things, and even the not-so-everyday things, in ways that are intuitive, simple, and fun. And it's loaded with useful features you'll wonder how you ever did without it.
Explanation
You don't have to be a genius, as long as you're good at using your resources.
See: http://support.apple.com/kb/HT2101 (iOS devices: Keeping device within acceptable operating temperatures)
See: http://support.apple.com/kb/TS4148 (iPhone: Troubleshooting No SIM)
See: http://www.apple.com/retail/geniusbar/ (Genius Bar Resource)
No. There are several troubleshooting steps to be completed. See: http://support.apple.com/kb/TS3281 (iOS: Not responding or does not turn on)
See: http://support.apple.com/kb/HT5018 (iOS: Configuring accessibility features) Settings > General > Accessibility-Invert colors
See: http://support.apple.com/kb/HT2519 (Download past purchases)
See: http://support.apple.com/kb/HT4810 (iOS: Adding an email account)
See: http://support.apple.com/kb/ht1430 (Turn your iOS device off and on (restart) and reset)
See: http://support.apple.com/kb/TS1702 (iOS: An app you installed unexpectedly quits, stops responding, or won’t open)
See: http://support.apple.com/kb/TS3780 (Phone: Troubleshooting a cellular data connection)
See: http://support.apple.com/kb/TS2755 (iOS: Troubleshooting Messages)
See: http://support.apple.com/kb/HT5163 (iPhone and iPad: How to remove the SIM card)
See: Knowledge Base>Search "Warranty Proccesses">Select approprate link for your position>Scroll to "Required Questions and Steps">See step two.
See: http://support.apple.com/kb/ts4430 (iPhone: Troubleshooting voicemail)
See: http://support.apple.com/kb/HT1212 (iOS: Forgot passcode or device disabled)
See: http://support.apple.com/kb/ts5183 (iPhone: Microphone issues)
See: http://www.apple.com/support/products/iphone.html (AppleCare+ for iPhone)
See: http://support.apple.com/kb/PH12519 (iCloud: iCloud storage and backup overview)
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