Thanks. The Diagnostics test was OK, but it did not equal to the sound heard from other end. Also, the SIM card is brand new one issued by telecommunication operator. I've tried the "GSM only" preferred network type, but it did not help and the internet connection speed became very very slow. Then I tried to adjust the setting below and it seems better: -> Sound & notification -> Accessory settings -> Mic sensitivity -> Low It was set as "Auto", but it cannot automatically optimise the mic sensitivity. Also, if I reboot it in safe mode, even it may work, I need to uninstall individual apps in the phone to test it. There are so many apps installed and it is impossible. Please check that whether there is any best solution.
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The new bought Xperia X Compact has problem during call with main microphone. Even adjusted the volume to highest, other end said that my voice is very weak. I needed to turn on the microphone (press Audio Output), then other can hear me clearly, but everyone could hear our talk! I found similar problem with Z3 Compact but not in X Compact: https://talk.sonymobile.com/t5/Xperia-Z3-Compact/Mic-problem-returned-after-update-6-0-1/m-p/1114111/highlight/true#M20372 - Software Update executed (Android 6.0.1 already latest in Hong Kong as this moment) - Diagnostics of microphone executed - No external cover was used - No headphone was used (so the noice suppression cannot be set) Other than returning to Sony Centre, what are the solutions?
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