With the emergence, or resurgence, of glass backs on smartphones, JerryRigEverything's Zack Nelson has a new calling: removing the paint behind that glass to create a "clear back" phone. Well, at least those that survive his torture tests. Sorry, HTC U Ultra. The latest to get that treatment after the LG G6 and the Galaxy S8 is the Xiaomi Mi 6. But, along the way, Nelson also tries to discover just how water resistant the thing is.