How to automatically update the mobile phone system to return to the previous version?

The mobile phone does not have the function of returning the updated version, so it can be taken to a professional repair shop. Just reinstall the required system.

Version, a Chinese character, pinyin is b m 4 nb ě n, which originally meant various books formed by copying, engraving or other means. With the development of the times, versions are also applied to movies, television, software and other things, describing two things with the same object but different introduction methods. From Song Shi Lin Ru Chuan Cui Yiyi Zheng.