Hey! Guys I have been using Sony Xperia Z1 since September last year and I am having a problem currently in which my voice clarity according to the people on the other line is blurry/not audible or not just clear seems to be some problem with my speaker i ran a diagnostic test and it passed all i can hear people when i use loud speaker and they can hear me back but when it comes to normal calls without the loud speaker they can't hear a thing please help although my headphones work when i call people thats the only way I am calling people right now! 

Any Solution would be appreciated! TY XO