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iPhone 4S has 512MB of RAM, same as iPhone 4? - The Verge
The iPhone 4S 8 years on
iFixit iPhone 4S teardown confirms 512MB RAM, updated baseband | Ars Technica
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Apple iPhone 4s - Full phone specifications
iPhone 4S - Technical Specifications
iPhone 4s - Full Phone Information, Tech Specs | iGotOffer
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RAM MOUNTS RAM-B-138-AP9U RAM Flat Surface Mount RAM-B-138-AP9U
Apple iPhone 4s specs - PhoneArena
iPhone 4S - Wikipedia
