Hello everyone, just received my iPhone 4 from apple today coming from a 3GS so far the screen is what I'm most impressed by. ANYWAY, it all would've been great if it weren't because after a couple of minutes of been playing with it noticed the sound didn't work... no ringing sound, no sound when locking the iphone, when typing letters, numbers, etc, you get the idea. It was a bummer... I though it maybe had to do something with the fact that I set it to use the backup I had from my 3GS. So I intentioned to restore it to factory settings to see if that was the issue, and I hadn't begun to do it, when the sound started to work.. out of nowhere. I was like, great! miracles happen! haha. After a while I checked and yes... it was ok for a while, and then it didn't work. And right now is like that, it is working most of the time now (really, right now 95% of the time it works) but I believe this is a hardware issue... So now the question: do you guys think I should go to apple directly ASAP and get a replacement, or should I wait maybe 3 days or something to see if this gets fixed with the use or something...? I don't want to get into the replacement thing... I would need to get a microsim to sim adapter use another phone, and then the replacement with apple is not as easy as it is in the United States, I live in Mexico and I think it will take at least one week to get a replacement... I don't want to get into it but I will if I have to. So, you guys think that waiting to see if it "calibrates" itself somehow or am I just being too optimistic? did anyone where experienced that kind of issue with its iphone 4? some more troubleshooting I might have missed? thank you guys... I'd appreciate all possible suggestions.