In addition to a protruding camera, those antenna bands represent the most controversial design feature of the iPhone 6 and iPhone 6 Plus. Blame the unsightly bands on the law of physics.
Though iPhones and cellular iPads and iPods would have decidedly looked sleeker without the bands, the radio waves cannot penetrate metal so an all-metal iPhone would be quite useless despite a stunningly seamless appearance.
But if a patent application Apple filed with the United States Patent & Trademark Office is an indication, future iPhones could easily get rid of the antenna bands on the back as Apple has apparently invented a metallic looking material that doesn't interfere with the functioning of RF antennas.