In this YouTube video by Ummet Ozcan, he appears to be playing a dance track by pressing the keypad on his Apple iPhone 5S. While it's most likely a joke, it does reveal he owns a white iPhone 5S. The configuration of the ear speaker, as well as the date on the video (March 2014) gives it away as this specific model.more
It doesn't metter if you are at work, in the shower or walking around the city. If you have a good idea you should save it somewhere, and this is one of the most important device you should have. The faster it is, the best it is.