Company
Apple
Device name
iPhone 5S
Released on
20 September 2013[1]
Available OS
iOS 12
Latest OS
iOS 17[2]
Is still updated
No
The iPhone 5S was released on the 20 September 2013[1], which marks the beginning of its update period. On the 19 September 2019, the iOS 13 was released, a next version of the operating system, which not made available for the iPhone 5S, thus leaving iPhone 5S on the the previous version of the operating system, the iOS 12[2]. This date marks the end of what we consider its update lifetime.
These two dates are 6 full years and 1 full months apart, which gives it AA tier.
Beginning of support
7 years