Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
I wear Nike Phenom running shorts. The zip pocket on the back-side is just right for the iPhone 6 and can zip it. It can squeeze an iPhone 6+ but won't zip so about a 1/2" sticks out the top.
It has another inside pocket large enough to hold a hotel key and CC or bills.
 
I bought a soulunar belt on amazon. Its similar to the flip belt except instead of flipping it has a zippered pouch. It does fit an iphone 6+ without a case. I know of peoples phones falling out of the waistbands without zippers.
 
Spibelt for me as well. I've also been running with it for years, but unlike the images on its website, I run with the pouch settled into the curve of my lower back. No bouncing and I forget it's there within the first few strides. Under my shirt, it's unnoticeable.
 
I use an armband with a 5s and jaybird BT earphones. Flipbelt is a good option, as well.
 
I used the Flipbelt the other day with the phone below my stomach at the waist, and after seeing the workout app for Watch report pretty slow pace times, I decided to take the iPhone out of the flip belt and carry it in my hand, which greatly improved accuracy....... the flip belt I have is a bit tight, so I wonder if my body is getting in the way of GPS for the iPhone as I have a little bit of a belly, maybe I should put the iPhone on my back instead of my front?

Did the same today. Now Workout seems much more accurate so I wonder if putting back in flip belt is ok? Might try it in on my back like you suggest.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.