I used mine naked for a few weeks, then decided to use a case as a precaution, since I dropped my iPhone several times in the past. I ordered a thin rubber red case from eBay, which I included a home/car charger and a screen protector for $10. The thin rubber case only adds a mm or two to the size and I haven't used the green protector since I keep the phone in a picket without keys and change (common sense, right?). The red isn't as nice as the polycarbonate red, but hoping this will mitigate damage ic I happen to drop it.
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