In this wirefree world where a handheld devices sends out four or five different kinds of radio waves to do all kinds of things, why do we still use wired headphones to listen to our music? Enter Bluetooth A2DP, or Advanced Audio Distribution Profile. A2DP is a technology that lets devices transmit and receive audio signals in high quality, stereo mode, as opposed to regular Bluetooth audio which is not very high quality and mono. Now, the real reason why most of us don't use this technology yet, is because Bluetooth A2DP headphones are expensive—sometimes as expensive as the phone itself— and they also need separate recharging since they run on batteries. But as all things finally come around, the prices of Bluetooth A2DP headphones will drop, so if you like to listen to music and hate wires, consider upgrading to one of these phones and cut off the cables.
Unfortunately all of the A2DP-supporting phones are over Rs. 10,000, that's why we went with the Rs. 20,000 list.
Sony Ericsson K790i Cyber-Shot Phone (Rs. 17,500)
The K790i has MP3/AAC playback, FM Radio with Radio Data Service support and TrackID music recognition. It also has a 2-inch QVGA (240x320) display, 64mb internal memory with Memory Stick Micro (M2) expansion and support for Bluetooth A2DP stereo. Also, the Cyber-Shot phone has an excellent 3.15 megapixel camera with a xenon flash.
Sony Ericsson Z610i (Rs. 16,000)
The shiny, mirror-finish clamshell Z610i does MP3/AAC playback, but sadly no FM radio. There is 16MB of phone memory and Memory Stick Micro (M2) expansion, a 2 megapixel digital camera and support for Bluetooth A2DP stereo.
Sony Ericsson W710i Walkman Phone (Rs. 15,900)
This clamshell Walkman phone has it all: MP3/AAC playback, FM radio with RDS, 10MB phone memory with Memory Stick Micro (M2) expansion, sports and fitness functions, a 2 megapixel digital camera, a large external display (128x120) and finally, support for Bluetooth A2DP stereo.
Sony Ericsson K610i (Rs. 13,750)
The K610 offers MP3/AAC playback, but loses the FM radio tuner. It has 20MB phone memory, a Memory Stick Micro (M2) card slot, a 2 megapixel digital camera and support for Bluetooth A2DP stereo.
what about k810i 
