I bought these ear phones about a year ago in a 3 Mobile shop. They cost me around £6.50, and are still going strong now!
I listen to music on my phone all the time, I walk everywhere now, and it keeps me motivated and stops walking being boring.
My Sony Ericsson pink phone came with some headphones, unfortunately the little bit that connects to the phone snapped, and I had to get some new ones. Those headphones were really good and I asked in the 3 shop whether I could just have the same ones again but apparently they only come with a brand new phone. So I tried a new pair.
My phone doesnt have a jack that you can just put any old headphones into, it has to be a sony ericsson headset, otherwise it wont plug in.
The sound quality of these headphones are excellent, the buds fit right into your ear, so you dont get any outside noise. This was a bit weird at first, and you have to check a lot for traffic as you cant hear it, but they definately block out a good amount of sound so you can just listen to the music.
The little buds are covered in rubber to keep them in your ears, I find that sometimes they come off if you rip the headphones out of your ear and dont do it carefully. This has happened quite a few times, but I can just easily pop them back on again. If I was going to buy new headphones again I would get ones without the buds on the end, as I always think Im going to loose them!
If you have a sony ericsson phone then these headphones are great quality, last a long time, and enable you to just listen to music and not the rest of the world.