I am happy to say it works great. No yellow, drop calls or regrets, it is a great phone and the screen is wonderful. I have used my iPhone 4 at home and in 4 parts of San Diego, no issues. At home my 3GS would sometimes get a weak signal and it would become intermittent while having a conversation. It would happen rarely but it did happen, so far, it has not happened on my iPhone 4. I enjoyed my 3GS a lot and the iPhone 4 is better by far. Now to buy some apps, oh boy.... I just thought the forum could use some good news about the iPhone 4 for a change. Not really important, but what the heck, have a nice day!