In pictures: Game changer - The iPhone then and now - Slideshow - ARN
iPhone 4S Only Has 512MB of RAM, Just Like iPhone 4 and iPad 2
Apple iPhone 4 White 16GB 512MB ROM Gsm Unlocked Phone Apple A5 Display 3.50-inch (640x960) Processor one-core Front Camera 0.3MP Rear Camera 5MP RAM 512MB Storage 16GB Battery Capacity 1420mAh OS iOS
Ram Mounts Model Specific Cradle for The Apple iPhone 4 & iPhone 4S without Case, Skin or Sleeve - Sportbike Track Gear
RAM MOUNTS RAM-B-138-AP9U RAM Flat Surface Mount RAM-B-138-AP9U
Apple iPhone 4 - Full phone specifications
Apple iPhone 4 8GB: Latest Price, Full Specification and Features | Apple iPhone 4 8GB Smartphone Comparison, Review and Rating - Tech2 Gadgets
iPhone 5 to keep iPhone 4 design and sport only 512MB of RAM? (Rumor) | Ubergizmo
iPhone 4 has 512MB of RAM | OSXDaily
iPhone 4 - Full Phone Information, Tech Specs | iGotOffer