The W800i is very similar to the K750i in looks, performance and features. Considering the K750i is an excellent phone, the W800i maintains this characteristic and adds to it in certain areas. The phone differences are limited to only a few, most of which are relevant to the improvement of the W800i. The MP3 sound quality, memory capacity and features are where the biggest difference between the two models lie. If you want to listen to music on your mobile but doesn't want it to sound like it is coming from your mobile, look no further than this phone