https://motherboard.vice.com/en_us/article/a3a3gg/iphone-6-touch-disease-documents

Apple’s internal tests found that the iPhone 6 and iPhone 6 Plus are significantly more likely to bend than the iPhone 5S, according to information made public in a recent court filing obtained by Motherboard. Publicly, Apple has never said that the phones have a bending problem, and maintains that position, despite these models commonly being plagued with “touch disease,” a flaw that causes the touchscreen to work intermittently that the repair community say is a result of bending associated with normal use.

The information is contained in internal Apple documents filed under seal in a class-action lawsuit that alleges Apple misled customers about touch disease. The documents remain under seal, but US District Court judge Lucy Koh made some of the information from them public in a recent opinion in the case.