Such a strange thing. I've owned a 4 since day 1.. but always bought cheap TPU and silicone cases for the first 6-8 months then tried various otterboxes but was never happy.. then recently I got a "new" iphone through advanced replacement, I wanted to protect it since it was like my new phone. I finally tried a Speck Candyshell (I always liked the appeal of them, don't know why I never got one before).. WOW. After fiddling with stupid silicone parts of otterboxes I was amazed how it just "fit" instantly. And its silicone and plastic part are fused as one. It reminded me of changing faceplates for older Nokias.. it's fun. It also makes the phone much more comfortable to use and solid feeling.