在Legend上用电子市场(Android Market)下载软件的时候误绑了Google Account，想删掉，结果发现提示什么有程序正在使用这个账号只能通过
Performing a using phone buttons
If you cannot turn on your phone or access the phone settings, you can still perform a by using the buttons on the phone.
With the phone turned off, press and hold the VOLUME DOWN button, and then briefly press the POWER button.
Wait for the screen with the three Android images to appear, and then release the VOLUME DOWN button..
Press VOLUME DOWN to select CLEAR STORAGE, and then press POWER.
Press VOLUME UP to start the factory reset.