I have had this unit a week. Its a 32 giig wifi only version. Loads of memory available as its running only a few simple apps It is unrooted. Running Android 4.1.2. After the usual update request it down loads the update (I assume this is 4.2) It then starts to install the update. Then after about 1 third through the Icon on the screen falls over with ! on it. I then have to switch it off using veeery long press, and then on again. This has happened twice. When I try a manual update it says it is up to date Any ideas before I take it back Thanks.