Sony ericsson xperia St15i unlocked and boxed still under warranty !

I am selling xperia st15i unlocked to all networks...Its not x8 or x10 its a newer version. It works i.e. turn on make calls etc however sometimes when you click something it goes back automatically as the back button seems to get pressed. Phone can be seen working. PLEASE NOTE: This phone is still under sony ericsson warranty and i can gurantee they will fix it for you free however i just dont have the time to send it out to them etc...If you want to fix it local its 15 why pay when its done free The phone is in very good condition and comes with box, charger and a USB cable. The youtube video gives you an idea of the fault and to be honest its not always there it pops up at different times Bargain...No timewasters 50 cash on collection Call or text me on 07900334459