At first, sorry about my english. Hello everyone. My redmi note 3 pro is using miui 7. Now, i want to upgrade it to miui 8 to reslove some problems. But my note 3 pro unlocked bootloader unofficial and i used to delete firmware-update folder in eu rom to prevent to relock bootloader. Now i want to clean-flash miui 8 on it and unlock bootloader by official from xiaomi. Which way can i use to safe and clean flash? EDL mode or mi flash? Thank for reading. Have a nice day .