I don’t think that every skin cover would be a problem for your mobile, you should be careful before buying those for your mobile. I know some good companies can exchange your skin cover if it’s okay or not to be used for long time. But precautions are better than prevention. When I buy blackberry mobile than first things I do is check out the fitting of my skin cover, after all it’s about my blackberry and my first expensive mobile too.
Blackberry torch skin cover