With my new case installed, I was able to talk on the phone for an hour. The call didn't drop. I was able to go from walking the dog outside back inside without it dropping the call. It never even cut out. I am amazed that the case made such a difference. Interesting enough though, as soon as I got off the call it did say "Searching" on the display rather then a signal. That is an issue with the new 4.01 update anyway... Frequently my phone will say searching instead of having 1 bar like it used to.. Oopsie poopsie Apple! I'll have to continue experimenting to see if this case really is going to solve some of my issues with reception on the iPhone 4!