這幾天把手機升級到ICS，卻發現臉部解鎖無法使用，設定內找不到選項。所以就研究了一番，因為我是使用鈦備份還原，一個個測試的結果發現是設定儲存空間惹的禍，復原此選項會造成選項安全性螢幕鎖定臉部解鎖選項消失。在這邊留下紀錄，希望可以幫到也遇到此問題的人。
I upgrade my sensation to android 4.0 (ICS) this week, and I found that I can't find face unlock function in setting > security > screen lock > face unlock. After doing some reserch, I notice that the Titanium backup is the application cause the issue. And the app Settings Storage must not to be restore. Hope this thread can do some help to people who confront the issue.
