Hi owners of xperia ZR. I am considering getting this phone. My point of consideration is mainly on the water proof feature. How good is this phone being waterproof? Any testament from actual owners? Previously i was using iphone with lifeproof case. Liked it very much, i threw the phone purposely at my condo swimming pool and it sat there for 5 minutes at depth of 1.7metres, took it out no problem. The only nag is to charge the phone i need to open the flap everytime, over a period of close to a year the flab became quite loose. I understand xperia ZR has this issue as well, as need to open the flab to charge the phone which may degrade the seal capability due to constant wear of that charging port seal. But i heard ZR has add on which can make the phone being able to charge without cable. Will that totally make the phone still be water proof with that add on?