Samsung Galaxy S5: the two Speakers always on???

view story

http://forums.androidcentral.com – Hi I just bought Samsung Galaxy S5 two weeks ago :) when I answer calls people next to me can hear the entire conversation through S5 back speaker without me clicking on the speaker button, if I do click the speaker the voices get magnified however if I un-click the speaker it is still working but with lower volume nevertheless the call can be still heard through the speaker and it is very clear :confused: why is the two speakers always (front & back) on at the same time? :( is there a way to deactivate the back speaker (the speaker is already turned off (un-clicked) though voices (HowTos)