Differences Between iPhone 4, iPhone 4S and iPhone 5: EveryiPhone.com
Infographie} iPhone 4S vs iPhone 4 - À Lire
iPhone 4 vs iPhone 4S - The differences exposed! - YouTube
Apple iPhone 4S review: Apple iPhone 4S - CNET
Do I Have an iPhone 4 or 4s and How to Tell the Difference
Emma Carr on Twitter: "iPhone 12 Pro Max vs IPhone 4S How did we even manage to use a phone this small!? #iPhone12ProMax #iphone4s https://t.co/BRZVduAGsu" / Twitter
iOS 5 and iPhone 4S review roundup - CSMonitor.com