LOL .well maybe you not wear that spandex outfit huh?
I wear loose comfortable shorts to the gym .hit the weights for an hour or more then cardio elliptical or treadmill. Never have i had a problem with my Note 3 in my pocket. But to each his own .that why they have so many sizes. One is bound to be perfect for what you need it to be ...
I think the bigger weights you lift, the smaller of a phone you need so it doesn't get in the way. That's why I need a smaller phone in the gym.