My Samsung Jet S8000 wont play any music through the speaker, except when a call or text comes through. I can hear the music through the headphones.

reset it and use you device again

your operating system have got corrupted. go to the samsung gallery and fix it

Call your service provider ask them to send you the MMS settings

basically ur qwerty kernel is all buggered. i suggest flashing the phone youll find a step by step guide via a search online. look for something like samsung s8000 flash guide?

Direct download themes
http://www.mobileheart.com/cell-phone-reviews/samsung-2/samsung-S8000-Jet-1808.aspx
http://www.umnet.com/phone/2300-Samsung_S8000_Jet
http://gallery.mobile9.com/c/samsung-s8000-jet-wallpapers_2255/1/
http://www.tehkseven.net/wallpaper/samsung-s8000-jet-wallpapers.html
FREE Ringtones
http://www.mobiles5.com/topic/samsung-s8000-jet/

Try putting it on speaker when u have answered the call,but you will have to do this every time!

take the headphones out play the music full volume then put the headphones in and lower the music all the way down then your volume will be normal and it will only play in through the head phones unless you take headphones out then it will play through speakers

make a factory reset.. type the code to your keypad menu *2767*3855#

goodluck