My Iphone4 inside an otterbox defender case fits very tightly (takes two hands to get it out)that is just fine with me. However, the metal belt clip seems to pull off the belt way to easily. If you want to remove the belt clip and secure it using the just the straps (on the back) threaded onto your belt in a horizontal manner then it will be as secure as possible. I can only recommend this if you don't use the metal belt clip.
Pros: Iphone very secure in case
Cons: Metal belt clip comes off easily
This review was written in the old system and had content requirements that are different than reviews written today.