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Aktualizovali jste Váš iPhone na iOS 9? Jaký je Váš názor? - AppleReportAppleReport
Apple iPhone 4S Firmware iOS Update 9.3.5 Download | TechSpot
iOS 8.3 Proven to Run Faster than iOS 9 Beta on the iPhone 4s
iOS 9.3.1 zvyšuje výdrž baterie | Diit.cz
Systém iOS 9 už používá více než polovina mobilních přístrojů od Applu - iDNES.cz
