can't take that clip showing parts being broken down seriously.. this is what repair shops in the USA do. who do you think phone thieves sell stolen phones too? these shops break them down and use them to repair customer phones instead of buying a more expensive lcd screen, battery, mic, usb port+flex cable, power button, housing or any pcb chip. every country on earth strips down mobile device parts because they can't be bought officially by the manufacturer, it's either use parts from other phones or use a counterfeit part. this is why mobile repair shops will buy "broken" phones to use for parts. the used part is more reliable than a counterfeit one in many cases.