When I plug the headset on my motorola V360, the music doesn't play on the headset, but continue playing on the phone speaker, so what is the heaset for? Is it only used for calls?

1)this feature not availeble
2)go to this link 100% sure solve your problem http://www.motorola.com/staticfiles/Support/US-EN/Mobile%20Phones%20Accessories/H620/US-EN/_Documents/Static%20Files/H620_QSG_US_9518A57A.pdf

These are the motorola device compatable with thise speakers

Motorola: A1000, A3100, A780, A830, A835, A910, A925, Aura, Backflip, C390, DEXT, E1000, E1070, E398, E550, E770v, EM28, EM30, EM325, EM330, EM35, KRZR K1, KRZR K3, L2, L6, Milestone, MOTO Z10, MOTOJEWEL, MPx, MPx220, PEBL U6, PEBL2 U9, Q, Q11, Q9, Quench, RAZR maxx, RAZR V3, RAZR V3xx, RAZR2 V8, RAZR2 V9, RIZR, RIZR Z8, ROKR E1, ROKR E8, ROKR Z6, Sidekick Slide, SLVR L7, T280, V360, V3i, V3x, V500, V525, V545, V547, V550, V600, V620, V635, V80, VE538, VE66, VE75, W377, Z6w, ZN200, Zn300, ZN5

this information came from:
http://www.mobilefun.co.uk/motorola-t215-p21185.htm

i could help you
first of all have you used the wired headset for your sidekick?

YOUR NEED TO DOWNLOAD APROGRAM CALLED
DIGITAL AUDIO PLAYER FROM MOTOROLA WEBSITE

If your handset does not support stereo music on blue tooth headset, then you can not hear music on blue tooth head set. However you are able to answer and make calls through blue tooth headset.

take it back and have the csr from the store correct the issue but first try a new one and see if it works.

it plays through the main spkr only nt frm th ear part

needs a speaker

yeah... You need the 8120 pearl for that feature.. I am guessing you have an 8100?

I bought the same headset and also have a K1m, I did research and found out that the k1m does not have a2dp technology so it will not play music on any bluetooth stereo headset, in order to listen to music through a headset you will have to get the handsfree wired stereo headset, bummer