The Evolution of Apple iOS: From iOS 1 to iOS 13
An 18-Year-Old Developer Successfully Recreates iOS 4 as an iPhone App; Calls It 'Close to Pixel-Perfect'
Preview: Five reasons to run iOS 4 for iPad - Software - CRN Australia
First Look: Apple's iOS 4 for iPhone, iPod touch | AppleInsider
Flashback: iOS 4 adds multitasking, FaceTime and other important features - GSMArena.com news
Apple's iOS 4 Explored
Elérhető az első iOS 13.4, iPadOS 13.4, watchOS 6.2, tvOS 13.4 és macOS Catalina 10.15.4 béta - Szifon.com
iOS 4 review | iMore
iOS 4 Features: MultiTasking, Folders, and Much More - MacRumors
iOS 4.1 Game Center Compatible Games in One Place | Redmond Pie
iOS 4 - Wikipedia
iOS 4 Has Been Rebuilt as an iPhone App | PCMag
iPhones Compared on Original iOS Versions - iOS 4 vs 5 vs 6 vs 7 vs 8 vs 9! - YouTube
Review: iOS 4 is a Welcome Evolution to the Best Smartphone Platform | Cult of Mac
How to Enable Emoji on iPhone iOS 4
Facebook App Is Finally iOS 4-Compatible. Fast App Switching, High Rez Graphics | TechCrunch
Download iOS 4.0 Firmware for iPhone and iPod touch | Redmond Pie
iOS 4 Brought Back to Life by Young Tech Enthusiast, Twitter Loves It | Technology News
Apple iPhone 4 Review
Accidental iOS 4 Wallpaper — Basic Apple Guy
How are you organizing your iOS 4 Folders? | iMore
Ars reviews iOS 4: what's new, notable, and what needs work | Ars Technica
Some iPhone 4 throwback lock screen : r/iOSsetups
