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Download iOS 4.0 for iPhone 4, 3GS, 3G and iPod touch [Final Version] | Redmond Pie
iPhone 4 - Wikipedia
Apple iPhone 4 - Software version - AT&T
iPhone 4S iOS 9.3.4 Performance - Final Update - YouTube
iOS 4.1 update for iPhone out on Wednesday? - CNET
iOS 4 - Wikipedia
