@slalomskie
The reception issue is firmware related, it happens on iPhone 3G and 3GS as well with 4.0 installed.
@dudrsnacks
Apps are not running in the background unless they are playing audio, voip calling, gps, task-completion etc etc...
Any app that isn't doing one of the backgrounding APIs isn't running, it's in saved state and really doesn't effect the battery or speed.
06-25-2010 10:12 AM