CNET has reviewed the Sony Ericsson W850i and they write - “Call quality was quite good, though voices sounded a bit hollow and the volume could be higher. On their end, callers could hear us plainly and said our voice wasn’t distorted. They could tell we were using a cell phone, but that’s not unusual. Speakerphone calls were satisfactory, with loud volume. Callers could hear us fine but it’s best to make speakerphone calls in quiet environments. Overall, we give the call quality a thumbs-up. UMTS support is included as well, but at present, the phone is incompatible with UMTS networks in the United States.”

Sony Ericsson W850i Reviewer - Opinion Thermometer

AvecMobile
TrustedReviews
CNET