Troubleshooting Softbrick and Update Asus Zenfone 2 ZE551ML to Android Marshmallow Troubleshooting Softbrick and Update Asus Zenfone 2 (ZE551ML) to Android Marshmallow Still warm the last few weeks, finally Asus Zenfone 2 is getting an update to Android 6.0.1 Marshmallow. Update to the latest Android did make some changes and there are new features. In this article there will be a tutorial how to update to Android Asus Zenfone 2 official Marshmallow from ASUS. So no need to worry, because it is stable and minimal bugs. In this article will help you overcome fails to boot, softbrick and how to update to the official ROM for those who are already using a custom ROM like CM13 in its Asus Zenfone 2. Preparation : 1. Make sure the battery is above 70% 2. Backup internal data storage, SMS and make sure it is in sync with your Google account. 3. Download ASUS FlashTool (+ Driver) 4. Download RAW ASUSfirmware version of Android Lollipop WW_Z551ML_2.20.40.194.20160713.raw . File size: 1.33 G...