just use system update today, then get the 3.1 release and what i do : 1. after FOTA, use Setting to do factory reset 2. Connect to Wi-Fi 3. Open Browser to download a APK 4. install the APK and Open, normal execute the AP to back 5. go to Samsung Pulse application then i got Browser and Pulse force close rapidly .... finally i long press the power key to shut down the device ! i could not enter to Android Launcher any more i just saw star animation again and again .... sigh now i am looking for how to do hard reset reference page : How to Reset Samsung Galaxy Tab to Factory Settings just like the article " Samsung Galaxy Tab 10.1 First Look Review " " I аm surprised bу thе lack οf a reset switch, whісh ѕhουld bе present ѕіnсе thе tablet dοеѕ nοt hаνе a changeable battery (whаt dο wе dο іf thеrе іѕ a serious software error, Samsung?). " .... SOS other page : Google I/O 特仕版 Samsung Galaxy Tab 10.1 今天升級 3.1 ... 然後再起不能 !