This is what comes into my mind whenever i hear about the sony ericsson's K850 ... Big camera, huge sound, tiny package  
The K850i is an all-rounder. The reason why it is an all-rounder is because Sony Ericsson have made this model a great walkman, a great camera and a great mobile phone. Here are some of the awesome features of this phone:
- 5-megapixel Cybershot camera has BestPic, which takes nine shots in sequence every time, making it positively tricky to take a bad photo.
 - It's also got Xenon flash for dodgy light situations, intelligent search and the Photo Fix capability. 
 - MP3 playback.. No doubt that the K850i lives up to the reputation that Sony ericsson has in creating walkman phones.
 - Easy browsing through your music collections, photo albums and videos.
 - Supports microSD as well as the Memory Stick Micro.
 - Ability to record video in QVGA resolution at 30 fps.
 
The model is a capable communications tool with quad-band GSM/EDGE/HSDPA support. The model seems to be awesome. Most of you might want to shift to this model which has everything that is needed.