When we want to change a new mobile phone, how can we deal with the old android phone? According to the survey, most users choose to sell it or give it to friends/relatives. While, if you decide to sell or give away your old Android phone, it will be of great importance to erase data from Android mobile phone before that. If you forget to wipe off files from Android device, some personal info on your phone will be leaked out and exploited by others, which may cause big troubles. There are a lot of Android Data Eraser programs online, they can help us easily do that.