Sony Ericsson K750i is a great handset by Sony Ericsson.Handset has great looks and feature packed handset. Provided with attractive yet very strong external body can withstand falls from height of one floor very easily.Battery backup is tremendous for a multimedia mobile.I’ve been using it for 2yrs 6 months now.Over 215hrs of call time, 1800hrs of GPRS usage and daily mp3 playback of atleast 2hrs yet the battery backup is still the same as I got when it was brand new.On a single charge, the battery works for 12 to 13 days without any use.During travel it does not continuously search for signal towers hence battery doesn’t drain out easily and runs longer.If we use its mp3 player on speaker and make calls then it goes on for around 3-4 days.Camera is the best in the class of 2MP autofocus camera with dual LED Flash. No 2MP camera can ever match its picture quality. Even a few 3.2 MP camera fail to match its picture quality.The camera lens are well protected by a camera lens cover.I’m using 2GB memory card with just 1MB space left in memory card and 500kb in phone memory yet the phone interface is so fast and highly responsive.Screen is a bit small in size but has good colour reproduction and image doesn’t look pixelate.Its sound quality is brilliant, be it on speaker or in headphones. If you get yourself HPM70 headphones then you will find no difference in K750 and walkman phones.This phone is equipped with Bluetooth, InfraRed and USB for connectivity.