Although Apple is not marketing the iPhone 6 as being water resistant, users have been reporting improved water resistance. Teardown investigators iFixit took an iPhone 6 apart, and determined that unlike older models, the iPhone 6 has a gasket-like layer of adhesive around the display. Since the display is already secured with screws, iFixit suspects that the adhesive has been used to improve water resistance.
This seems to be confirmed by the modification of the smartphone’s casing to accommodate the sealant, but with the exception of a silicone seal to protect the logic board, no other modifications have been made to the design.
While the iPhone 6 may be more water resistant than its predecessors, it cannot be said to be ‘waterproof’. However, iFixit investigators note that recent patent filings by Apple indicate that the development of a truly waterproof phone may be in the pipeline, likely assisted with the use of adhesives.