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iPhone 4S - 技術仕様 (日本)
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iOS 9 Performance on iPhone 4s and iPad mini | IT PRO
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iPhone 4S Battery Life (Real-World Tests): EveryiPhone.com
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Apple iPhone 4S battery test is complete, here go the results [TEST]
How to downgrade Your iPhone 4S iOS 9 to iOS 8 NO-SHSH-BLOBS - Android2techPreview
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iPhone 4S - Wikipedia
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iOS 8 Vs iOS 7.1.2 [Battery Life Comparison] - TechGreatest
iOS 8 How-to: Monitor & track your battery usage - 9to5Mac
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iPhone 4 and 4S users reporting dramatically decreased battery life - The Verge
IOS 8 Battery Life on iPhone, iPad, iPod Touch.
