Has anybody had the same problem as i have while out on my bike useing sports tracker every thing is fine till around 20mins into my ride then i notice the tune of my phone turning its self off its all worked fine before but i carnt finish a ride now and its getting rather tireing i have also noticed that i can not play any videos i have taken on the phone on my computer while trying to replay them on windows media player its saying the file is not recognised have i done somthing to my phone or is it playing up cheers Darren