Sony Ericsson acknowledges there is a problem and has said “the noise is caused by the tuning of the secondary microphone [which is] too sensitive and can be perceived especially in silent environments. Tuning is software related so a software update should solve the issue“. Another representative said that this issue “will be fixed in a future software update for the phone“, although timing remains unknown right now. Let’s hope this is a software issue. The last thing SE needs right now is a hardware recall. See the videos below that highlight the issue. If you also have a problem on your Xperia mini pro, voice your concerns in the official support forum.
httpv://www.youtube.com/watch?v=8gZvZD5vI2w