iOS 8 on the iPhone 4S: Performance isn't the (only) problem | Ars Technica
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
Will iOS 9 slow down my iPhone 4s or iPhone 5/5s? Perhaps a little (Video) - 9to5Mac
iOS 4 review | iMore
New lease on life or death sentence? iOS 7 on the iPhone 4 | Ars Technica
Facebook App Is Finally iOS 4-Compatible. Fast App Switching, High Rez Graphics | TechCrunch
iPhone 4 through the ages: From 'antennagate' to iOS 7 (pictures) - CNET
iOS 4 - Wikipedia
Just found my old IPhone 4 with IOS 7 on it... what should I do? Sell? Jailbreak? Keep? : r/iphone
iPhone 4 through the ages: From 'antennagate' to iOS 7 (pictures) - CNET
iPhone 4 iOS 7 vs. iPhone 4 iOS 6 - Opening Apps Speed Test - YouTube