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Apple IPhone 4s Price Reviews, Specifications
iPhone 4S clocked at 800MHz, still crushes iPhone 4 (and everyone else) as advertised - 9to5Mac
Apple iPhone 4S (photos) - CNET
The iPhone 4S 8 years on
iPhone 4s - Full Phone Information, Tech Specs | iGotOffer
Differences Between iPhone 4, iPhone 4S and iPhone 5: EveryiPhone.com
Apple iPhone 4S review
Apple iPhone 4S (photos) - CNET
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iPhone 4S - Technical Specifications
Apple iPhone 4s - Full phone specifications
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iPhone 4S - Wikipedia
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iPhone 4S has 512MB of RAM, same as iPhone 4? - The Verge
Notes From iFixit's iPhone 4S Teardown: 512 MB of RAM, New 3G Chip - MacStories
Apple iPhone 4S Specifications, Price, Features, Review
Apple iPhone 4s specs - PhoneArena
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