Its difficult to find one that won't cover the back at all since the edges of the battery cover is sitting flush with the chrome trim. The closest I got was modding a thin 0.3mm case and cut out most of the back.
The problem with most super ultra thin case is its made of plastic so it doesn't offer any side grip. You could put a skinomi clear skin on it for grip but I decided to just apply the skinomi skin directly to the chrome of the phone only and will just use my modded one for back up.
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