So I bought a Vapor 5 aluminum bumper off eBay a week ago and it arrived yesterday. I put it on and experienced no signal loss throughout the day. At the end of the day, I decided to use a carbon fiber back skin that came with the case. I soon noticed that my wifi connection was at 2 bars. I've never seen my wifi connection have 2 bars before. Its always 3. So today I decided to do a test. Tested it many times with and without the back skin. No bumper during all tests. Here are 6 tests, I'm sure you can figure which three results had the skin on. Middle column: Download Right Column: Upload Is this common? I didn't think a back skin protecter would do that. The back skin protector is pretty thick though.