I had the K750i for a couple of weeks (pretty much the same as the w800i minus the walkman feature), and I was impressed by the features but I had to get rid of it because the reception was HORRIBLE, even though I live in a 1900MHz area. Had dropped calls multiple times a day. No reception in my workplace with the K750i, while my V3i has full reception. Battery life was around 2 days compared to 5 days on my V3i. Just stick with the V3i.