The Apple iPhone 5s was launched back in 2013. It was the third time Apple had tried the 's' nomenclature, which eventually became a product cycle for the company. Despite the name, the iPhone 5s launched with several major advancements over its predecessor. One of them was the fingerprint sensor or Touch ID, which we take for granted these days (well before the iPhone X came around, anyway). It was also the first phone to have a 64-bit processor, which is so commonplace now we don't even talk about it anymore. The lists of firsts continue with the debut of gold color in the lineup,...
Source: https://www.gsmarena.com/can_you_still_use_an_iphone_5s_in_2018_with_ios_12-news-33339.php