So I'm about to kick my butt back into shape. I'd really like to be able to use some of the apps on my phone for exercise which use GPS. I have an old phone I would use if I could, but since it has no service, I can't. I know that the Pro is definitely not a phone meant for running or any sort of fitness stuff. Regardless, has anyone used their phone for running or music or whatever? If you have, what sort of case and/or strap do you use to keep it with you?