I've had two broken USB-C connected phones in the past, the Oneplus 3 and Oneplus 5. Both had their C ports on a separate flex cable, with the port itself screwed onto the aluminium back of the phone on both sides. I was pleasantly suprised by this, it is a really solid construction. I've never had a broken USB-C socket though, it's been the battery for both phones. I think the C port is the best mobile connector on the market ever from a physical point of view.