The iPhone 5s, which was launched back in 2013, featured Touch ID, a True Tone LED flash, a 64-bit processor. The other new features included a 15 percent bigger camera sensor, 5-element lens, Slow-Mo 720p video shooting at 120 frames a second and Burst Mode.
The Apple iPhone 5s was available in Space Gray, Silver and Gold options for first time. The previous-gen Apple iPhone 5 came in Silver and White and Slate and Black. This iPhone 5s prototype is very unusual as it utilized the iPhone 5’s Slate and Black color variant.
While it’s possible that the iPhone maker was considering providing its iPhone 5s device in Slate and Black, before choosing Space Gray color instead, DongleBookPro says the color was probably utilized to conceal the next-gen phone during development.
Additionally, it should be noted that this iPhone 5s prototype was developed in 2012, just 3 months post the iPhone 5 was launched. This provides a little indication on how far the development cycle of the iPhone runs.
The iPhone 5’s Slate and Black color options was dropped ultimately and Space Gray was selected instead for iPhone 5s. The only iPhone models since that weren’t available in Space Gray color option were iPhone 11, iPhone 12/12 Pro and the iPhone 7 as well.