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Many people would like to have a bumper case as they think that it is protective. Also, it looks smart and cool. I agree with this. So, I bought a metal bumper case and used it for several weeks. I found that the wifi signals is weaker than before. I am not sure this problem is due to the bumper case or the Internet provider. Today, I read a http://www.dsstyles.com/news/2012/dsstyles-iphone-5-metal-bumper-case-review.html?utm_source=blog&utm_medium=luuux&utm_campaign=feedburner1212 which talks about this problem. This bumper case will really have a little impact on the signals strength . So I think it is not a big problem.