When I first got my Blackberry Curve 8310 Smartphone it worked great and I loved it but within a couple of months of having it, I began to get annoyed with the little select ball on the phone. I mean don't get me wrong, this phone has some pretty incredible features and really is worth the price, I just didn't care much for the rolling select ball. Battery Life The battery life on this phone lasts a pretty long time, I took countless pictures and listen to music all day and still had some battery juice left before I went to bed. Display/Screen Quality I have to admit this screen gets incredible quality, some of the pictures I have looked at on my blackberry were clearer on my phone than my regular computer. Call Quality I had a whole lot of dropped and crackly phone calls but I believe that had more to do with me living in the country than it did the phone itself. Ease of Use It is pretty easy to use, I don't really care much for the rolling select button though. Durability This phone has a pretty sturdy outer body, I have banged it up quite a few times. Design Awesome design, very sleek and easy to hold.