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iPhone 3GS - Wikipedia
Apple iPhone 3GS - Full phone specifications - GSMArena.com
iPhone 3GS - Technical Specifications - Apple Support
History of iPhone 3GS: Faster and more powerful | iMore
Apple iPhone 3GS review: Apple iPhone 3GS - CNET
Apple Announces the New iPhone 3GS—The Fastest, Most Powerful iPhone ...
iPhone 3GS review | TechRadar
Apple iPhone 3GS 8, 16, 32 GB* Specs - EveryMac.com
Apple iPhone 3GS specs - PhoneArena
iPhone 3GS - The Apple Wiki