O2 (8GB) is the smart phone I ever have. Its sexy style compelled me to buy it. Now, I updated to 6.5 version. Nevertheless, it seems crushing from time to time. Then, all I had to do is to take out its battery to start it up again, because none of its buttons are working. I am not sure whether the machine itself is deplorable or some of the software I am using is incomplete.
Better try iPhone next time.