A friend and I both purchased Sony Experia Z5 phones last year. He started having an issue of the screen going black when making a call and being unable to select the external speaker function. The charging port on my phone went bad and after replacing it I started having the same issue. I can place calls but the screen goes black and I have to hold the phone up to my ear to hear. It doesn’t make any difference if the phone is held at an angle or if it is laying flat when dialing. It doesn’t do it every time. It’s an intermittent problem. Any ideas what may be causing this?
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