I just tested my iPhone 4 with my vapor case and remember I am 10 feet from a microcell. I put my phone in field test mode and without the vapor I was at -53 db, when I put the case back on I went to -79 sometimes clear up to -81 and 4 bars and my case is insulated. This thing is ridiculous, lose almost 30 db because of a case!!
Would you test it with just each half of the case on the phone ... so that it does not make a completed circle?