How to withdraw from beta test of each model and app is as follows.

1. In the each model's Beta screen, select "more menu" button of upper right side.
2. Then you can see the Leave menu, you can leave the each model's Beta by using the menu.
3. When you select the Leave menu, you can see the cautions and withdrawal survey.
4. After submitting the survey, the state of your phone becomes a normal mode.
   (You should follow the cautions. Smart Switch rollback, too.)