The smartphone industry has been one of the fastest growing industries in the field of tech. Going all the way back, the era of simple, small screen phones with physical keypads evolved into bigger phones with bigger screens and fewer physical keys, and has now reached a point where phones are huge with no physical keys or buttons, at least at the front. For the next logical step in the evolution of smartphones, manufacturers tried to fit an even bigger screen, but in a small form factor. Enter folding phones.