I bought the 64gb model today. It has the ballistic Kevlar backing. the three model phones they make all have a different back on them... Why ???
I tried on the otter-box commuter and the Incipio (spelling???), that they had, and it fit a little funny.
From what I was able to conclude was most cases will fit great on the plastic, or smooth backed phones, but may be an issue with the "Ballistic Kevlar"