iPhone
iPhone supports iPhone OS 1 through iPhone OS 3. It can't be updated to iOS 4 or later.
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iOS 272026Not supported -
iOS 262025Not supported -
iOS 182024Not supported -
iOS 172023Not supported -
iOS 162022Not supported -
iOS 152021Not supported -
iOS 142020Not supported -
iOS 132019Not supported -
iOS 122018Not supported -
iOS 112017Not supported -
iOS 102016Not supported -
iOS 92015Not supported -
iOS 82014Not supported -
iOS 72013Not supported -
iOS 62012Not supported -
iOS 52011Not supported -
iOS 42010Not supported -
iPhone OS 32009Supported -
iPhone OS 22008Supported -
iPhone OS 12007Supported