Model HTC Sensation Z710e One plus year old. Before it had Android 2.3 I saw that an upgrade was available and attempted to do it. For a few days it worked. But now it is unstable and keeps reloading. There are messages sometimes about HTC Sense not working but these don't stay showing. Message System update is available is shown. Currently on About phone I have: s/w Android version 4.0.3 HTC Sense v 3.6 Model HTC Sensation Z710e Browser WebKit/534.30 I can't do anything from this phone, like Software update. I have installed HTC Sync on the PC but it says the phone is disconnected when I connect it. How can I get it back to a stable situation? Help gratefully received.