Product review (1 stars): Not much good
Essentially worthless. I've got Geib style cases, and the tape won't stick to the lining, so I'd have to remove it every time I moved the case. I had it in a case about 10 feet from my phone, and it wouldn't pick up a signal most days. I suppose I could lay the phone on the case, but that's a bit silly. A much better alternative would be the Oasis hygrometer, but that requires you to actually look at it to see the reading. Oh, the inconvenience.