iPhone 4s now officially 'obsolete' after Apple announces iOS 10
Update iPhone 4 to iOS 8 or 9 - Is this Possible?
What's new in iOS 10 - Apple
Still using an iPhone 5? iOS 10.3.4 is required to keep your phone working - 9to5Mac
Farewell iPhone 4: No iOS 8 upgrade for you | ZDNET
What's new in iOS 10 - Apple
How to Update Your iPhone to iOS 10 | WIRED
Apple releases iOS 10 for iPhone, iPad and iPod touch to the public - 9to5Mac
Goodbye, A5: iOS 10 ends support for iPhone 4S, iPad 2, and more [Updated] | Ars Technica
How to get IOS 10 on iPhone 4/4s - YouTube
Download iOS 10.3.4 on iPhone 5 Right Now or Lose App Store, iCloud
Reality of iPhone 4s iOS 10? - YouTube
How to Downgrade iPhone 4 from iOS 7 to iOS 6.1.3 (Without SHSH Blobs) – iPodHacks142
iOS 10 device compatibility list
Downgrade iPhone 5 / iPad 4 From iOS 10 -10.3.3 to iOS 8.4.1 - 3uTools
Download iOS 10 / 10.0.1 IPSW for iPhone, iPad, or iPod Touch - Touch Arena
How to Update your Apple iPhone 4 / iPhone 4S from iOS 5 over WiFi (over the air) - YouTube
How to Update iPhone 4, 5, 5s, 6, 6+ to iOS 15 | Download iOS 15 on Old iPhone - YouTube
iOS 10 review: the coming of age of apps | TechCrunch
List of iOS 10 Compatible iPhone, iPad, and iPod Touch Models [Updated] - MacRumors
How can i upgrade my ios in iPhone 4 - Apple Community
question] Recently got my hands on an iPhone 4 running iOS 7.1.2. Should I jailbreak it? Btw it's a 32gb white, I also need to replace the battery. : r/LegacyJailbreak