Apple iPhone 3G Black (8 GB)

I have had my Iphone 3G for about 8 months. I loved it at first. It was very fast when it came to text messaging, emailing, facebooking, and even opening a search on the internet was pretty quick to be a cell phone. Gradually after about 3 or 4 months of having my phone it started to become slower and slower. It seems like it takes minutes to load a text message anymore. My biggest issue with my Iphone is that the circular button the main screen pretty much used for everything, is starting to wear out and not work. I have to push it down very hard and very many times to even get my screen to pop up. It has started freezing, for instance when someone calls I will swipe it to answer and it will not even answer it, its as if I havent even tried to answer it. It has started to not receive my emails when i get them, and it also won't send emails. I have to re-send emails a few times before they actually go through. The speaker is starting to mess up, it starting to sound crackly and not as loud as it used to when I first bought it. I bought the Iphone 3G because we switched from ATT to Verizon and I had the first Iphone with ATT and loved it and thought that I would enjoy this one just as much. It was great at first, but it is becoming worse and worse the longer I use it.