Stats showdown: iPhone 4S vs. iPhone 4 - 9to5Mac
iPhone 4 and 3GS Rank as Best-Selling U.S. Smartphones - MacRumors
iPhone 4S officially announced: lands October 14th starting at $199 in sizes up to 64GB, coming to Sprint | Engadget
iPhone 4 Price Guide | OSXDaily
Apple to Release iPhone 4S with New GPS Features? - MacRumors
White iPhone 4 Now Available At An Apple Store Near You! | Redmond Pie
The evolution of Apple's iPhone | Computerworld
White iPhone 4 arrives. What took so long? - CSMonitor.com
The iPhone 4S - MacStories
iPhone 4S Pricing: 16GB is $199, 32GB is $299, 64GB is $399 | OSXDaily
iPhone 4S Prices – Worldwide Guide – Mac Crazy
Apple Prices Unlocked iPhone 4 At $649 | TechCrunch
AT&T iPhone 4S review: AT&T iPhone 4S - CNET
iPhone 4S Pricing: 16GB is $199, 32GB is $299, 64GB is $399 | OSXDaily
Apple iPhone 4S review: Apple iPhone 4S - CNET
Geeked: There's a new(ish) iPhone!
White iPhone 4 now available for sale internationally | Engadget
iPhone 4 - Wikipedia
iPhone 4S / 5 appears in Apple's inventory system, iPod touch may see price drops - 9to5Mac
Apple iPhone 4 review: Apple iPhone 4 - CNET
White iPhone 4 release on April 20? | OSXDaily
All about the new iPhone 4S (2011)
Should You Buy the New iPhone 4S? Pros & Cons
iPhone 4 | Apple Wiki | Fandom
