Interesting as this is kinda the opposite of the typical speakerphone problem where when you toggle it on and off the person can't hear you (or you cannot hear them). A reset normally works for the problem I mentioned, until it reappears again. Has that worked for you? The speakerphone problem is well known to asus and has been a problem since launch. Happens as a result of toggling speaker phone on and off or something similar. Return the phone to asus. Hopefully they will get a fix sorted. They haven't fixed mine though ☹️.
