Hi Guys,
My first version of the case killed the signal pretty good but I changed 2 things that restored the signal...
1) the spacers are aluminum and it was shorting out the antenna, I added heat shrink around them but they are now made from nylon.
2) If you look at the picture of the back you will see the semi U shaped cut out near the bottom. The original case back did not have that and the wifi signal was being affected the most. Once I added that open area on the rear the signal went back to normal.
If you search the web for "internal iphone4 antenna you can find info suggesting that an antenna resides in the lower rear section of the phone.
While not scientific my signal around town has unchanged from what it was before installing the case.
What I am planning on doing is making the cut out larger and inlaying some Brazilian Cherry for a nice contrast. I also plan on using smaller hardware and reduce the size a bit more.
BTW... Its not a tin hat, its a plate you put in your shoe!!!
