The upcoming iPhone 5S is about as well a kept secret as the fact that human beings landed on the moon in the 60s; with anticipation building to a deafening crescendo for the upcoming smartphone, designer Martin Hajak has unveiled his personal iPhone 5S concept mockups. The results are impressive to say the least, even if they're not officially from Apple.

The latest iPhone 5S rumors are that Apple will be releasing a mini version of their incredibly popular device as well as finally giving customers a choice of colors. Hajak's iPhone 5S concept models take into account the idea that Apple will also be releasing a more budget-conscious version of the iPhone utilizing cheaper materials. While we're playing fantasy with these iPhone 5S concept mockups, Hajak also included 4 and 4.5-inch versions of the phones.

Personally, I think that the blue and red models that he came up with are pretty cool within the classic iPhone design.