I received the Iphone4 the first week in July and have had numerous dropped calls. I purchased a case and still had the issue with the dropped calls. Yesterday I did somoe research and noticed that the phone with the case and without would drasticly loss the signal and go from 5 3G bars down to none while I was holding the phone. When i set it down on my desk the signal would return.
I spoke with Apple and went to the closet store, about 2 hours away, last night, the rep was awesome and explained alot about the phone and the problems. The antenna runs along the out side, there are 3 one is 3G, the other is Wifi and the last is bluetooth. The small bands along the outside of the phone separate each antenna. Well when you hold the phone it creates a contact between them and causes the signal to drop.
He explained that Apples process for this is as follows, reset your network, replace the SIM card, then restore the software (start from scratch). After all this they will replace the phone. He mentioned the the bumped helps but the number one reason is the signal strength.
At the store they have a tower on the roof, the phone would not loss the signal at all and would not.
So while researching the phone history I had almost half of my calls dropped, not failed, dropped. So the Appple rep, doing the right thing, replaced my phone.
Well, I am back at work and it is doing the same thing again!!!
I dont know what a software patch will do as the tech says its not software related!!
This is a frustrating thing, I do beleive that most people that are not experiancing the problem have a great signal strength so the phone is not effected. As for us not located in bigger cities you will have to deal with the problem for now.
I hope this helped anyone looking to go to apple, I know the store I was at had about 40 people there dealing with this same problem!!