Couldn't find a post on this but forgive me if it has been posted before. My iPhone has gotten extremely slow responding to entries, whether the "home" button or anything on the touch display. Sometimes it takes about 30 seconds for an application to open, or to get back to the home screen. At other times the response is totally normal (less than a second). I've been having occasional lagging issues since I bought the phone, but initially it was only up to 2-3 second wait times. Now it got increasingly worse so the phone has become almost unusable. Does anybody have similar experience? Suggestions what to do (besides restarting the phone, which I've done many times)? Thanks.