Iphone stays put when jumping around, love the use of the headphone wire holder.

This TuneBelt has declined in quality nor does it fit the iPhone 4 very well

The single piece construction is durable and well-made while the size of the phone space can fit both my Blackberry Bold as well as my iPhone 4 with a bumper on it.

Fits the iphone perfect even in it's case.

I had an iPhone 4 and it worked excellent for running

The iPhone is tough since it is a touch screen

My iPhone is very secure in the armband, which is the most important thing to me - I don't want any accidental drops.

My iphone fell out of my pocket and the glass cracked.

4/4s well and even fits iphone 5s (just recently upgraded to a 5s) although the phone sticks out just a bit

Love this arm band, it fits my iphone perfectly and it comfortable

maybe my iphone 4 (with a bumper on) would fall out

The iPhone 3g 3gs will not fit like this

I have an Iphone 4 with a slim case and this armband works really well.

Fits the IPhone 4 perfect even with a otter box case on it

It stays up very well, fits my iPhone with an Otterbox Commuter case as well.

btw, i have an iphone 4s and used to have an iphone 4 and it worked like a charm with both

It holds my iPhone 4 with the bumper on it just fine while I'm running.

However...There is a very simple fix which makes the iPhone 3g 3gs fit like a glove

This armband is not large enough to fit the IPhone well, so part of it ends sticking out and the front window wrinkles making it difficult to press the touchscreen while you run

I originally was going to give this a 1-star review as punishment for the company claiming it would work the iPhone 4, but in the end it is a passable arm band even for this phone.