Jeśli chodzi o słabą jakość rozmów to zauważono to również w recenzjach:
Sony Xperia M - Call Quality
Like the Xperia L, the Xperia M suffers from some distortion on both ends of the call and things can struggle to come out exceptionally clear. There are no signal dropping issues and the inclusion of Sony's HD Voice no doubt helps eliminate background noise. Inside a packed pub we still needed to move away from the crowd to take the call. Things do improve when you are using the speakerphone, but clarity far from impresses.
Sony Xperia M - Battery Life, Call Quality, Speaker Quality and Verdict
Call Quality
Sony Xperia M Review
Call quality was a big disappointment for the otherwise well-rounded Xperia M. Sound in the earpiece was a bit quiet, but the bigger issue was with an unnatural rumble to callers voices and a slight distortion, especially when the conversation gets heated and voices louder. On the other end of the line the situation is even worse. Our callers reported hearing our voice very distorted to the point where they had trouble to understand certain words.
Sony Xperia M Review - Call Quality, Battery and Conclusion
Ja jakość rozmów oceniam na 3 w skali 1-5, czyli słabo