[quote name='crunchewy']Also, for those seening generally worse reception (not the antenna bridging issue, but generally worse signal), have you tried a "network reset":
http://www.tuaw.com/2010/07/06/iphone-4-reception-issues-a-network-reset-might-help/
Probably voodoo, but maybe not? It doesn't hurt to try, anyway.[/QUOTE]
When I called Apple Care because my internet kept dropping out (my phone would be showing five bars of service, and I'd be able to make calls without difficulty, but I'd have no internet whatsoever), the tech suggested doing exactly that. It did, indeed clear up the problem, but for the first few times only temporarily -- the network would work fine for a few hours after doing it, or even until the next day, and then drop out again. The last time that I had to do it was last Thursday, though, and (knock on wood) it's been good since.
The way that the tech explained it to me was that they suspect that there's some error occurring when people are restoring backups from older iPhones to their new iPhone 4s, and the iPhone 4 is mistakenly getting the network settings for the older phone, which aren't correct for it. A network reset causes it to restore the proper settings for the iPhone 4. Sounds plausible, anyway (though it doesn't explain why I had the issue for several more times after that, when I didn't do another restore).
The downside of the network reset is that it's a
complete network reset. In other words, not only will it reset the cellular network connection, it will also clear out all of your wi-fi network information as well. Which is really damn annoying when you use the phone on multiple wi-fi networks and you have to keep re-entering the SSID and security info for all of them every time.