This is reply of another postApple is famous for innovations in Information Technology including communication industry and iPhone is one of them. iPhone, is supposed to be as a compact cellular MAC with mobility.
Android equipped phones being much cheaper in price could snatch Apple's iPhone customers, overall. Another reason may behind that iPhone always given new technologies and innovations which are even copied by it's rivals later on.
Check out the infographic revealing comparison of innovation of different iPhones, model wise.
Replied Infographic in Technology