A camera that physically retracts out of the phone, the world's first smartphone with a 100% recyclable back design, the world's first phone powered by a 4nm MediaTek Dimensity 9000 chip. Tecno's premium Phantom X2 series has a lot of world firsts. But are they any good? Does the phone live up to the hype? And what about the price? Find out everything in the full review.