Should be ... it isn't a great technical effort

Update: ... that article said "covered headphone jack" ...
http://www.pcmag.com/article2/0,2817,2411879,00.asp

Harry

 

My headphone jack has a rubber cover. Your's does not?

 

Yes the port is waterproof. The cover is there to keep dirt particles out of the port. The 2 microphones (voice and noise cancellation), speaker, earpiece, camera, flash, are all waterproof too. I've dunked mine many times in the sink and rinsed it off to test it when it was new to confirm it's waterproof. The only issue is after it gets wet, the microphones need to dry otherwise people will say "you sound muffled". Once the mics dry out, sound will return to normal. I use a BT headset most of the time so it doesn't matter, but just FYI.

I bought this phone primarily to use near pools, hot tubs, showers, etc. without fear of it getting splashed. Works great.