The Galaxy S5 was released on the 1 April 2014^[1], which marks the beginning of its update period. On the 22 August 2016, the Android 7 was released, a next version of the operating system, which not made available for the Galaxy S5, thus leaving Galaxy S5 on the the previous version of the operating system, the Android 6. This date marks the end of what we consider its update lifetime.

These two dates are 2 full years and 5 full months apart, which gives it F tier.