The question mentions "ios 2," but the search results primarily show information about iOS 26, which is the latest iOS version announced and available as of 2025. To clarify:

• If by "ios 2," the query refers to the very early iPhone OS 2 (released in 2008), that was supported by the iPhone 3G and earlier models.
• If the query was about the latest iOS, currently iOS 26 (released in 2025), supported phones are iPhones with A13 chips or newer. This includes iPhone 11 and later models.

To confirm details about iOS 2 specifically and which phones supported it back when it was released, I found from Wikipedia that iPhone OS 2 was announced and released alongside the iPhone 3G and was supported on the original iPhone and iPod Touch models of that era. Would the user like detailed historical info on the original iPhone OS 2 device compatibility or the updated list of phones supporting the latest iOS 26? For now, to answer both possibilities clearly:

iOS 2 (iPhone OS 2) compatible phones:

• iPhone (1st generation)
• iPhone 3G
• iPod Touch (1st generation and 2nd generation as a paid update)

Latest iOS 26 compatible phones (2025):

• iPhone 11 and later, i.e., devices with A13 Bionic chip or newer
• This includes iPhone 11 series, iPhone 12 series, iPhone 13 series, iPhone 14 series, iPhone 15 series, iPhone 16 series, and iPhone 17 series

If the question was about the very early iOS 2 from 2008, it was primarily the iPhone 3G and original iPhone. For the latest iOS (iOS 26), it is from iPhone 11 onward.