How-To: Install iOS 11 public beta on your eligible iPhone, iPad, or iPod touch - 9to5Mac
How to upgrade to iOS 11 on iPhone 5 - Quora
List of iOS 11 Compatible iPhone, iPad, and iPod Touch Models - MacRumors
Original 4.0inch Iphone 5s IOS 11 Apple IPhone5S A7 64G With Finger Print Touch ID Unlocked Refurbished Cell Phones DHL From Dhgate_factory, $178.2 | DHgate.Com
iOS 11 on the iPhone 5S: Slower, but not quite slow | Ars Technica
Apple's iPhone 5s takes comparatively mild speed hit from iOS 11 upgrade | AppleInsider
If you have THIS iPhone, Apple will likely NOT let you update to iOS 11 | Express.co.uk
All Topics — Apple iPhone 5S (iOS 11)
Apple Reminds iPhone 5 Owners to Update to iOS 10.3.4 by November 3 - MacRumors