Hi, guys. When my Redmi 3 PRO came from China, it had some custom, fake global ROM. I was trying many options, and only fastboot worked out. These are my questions: 1. When going from custom ROM to EU ROM, why it is needed to install official ROM first, unlock it and then flash EU ROM? How could someone install custom ROM and still after that bootloader was locked? (btw. I succeeded with fastboot China stable ROM, everyone is saying it must be China developer ROM) 2. Right now I have latest stable EU MIUI 7 ROM installed. Am I going to be able to install MIUI 8 EU via Updater app? 3. I guess that bootloader will be locked again only if I install official ROM for any reason. If so, do I need to apply for unlocking again? 4. Going from EU EMUI 7 to EU EMUI 8 version, via TWRP - Can I do it directly, or still need to install official ROM first? 5. Do I always need to boot to TWRP via fastboot boot recovery.img command? And install TWRP each time when want to change ROM? Because I could not boot to TWRP in any other way. Thanks.