16 Apr 2017
https://www.miuiportugal.pt/forum/threads/redmi-4-prime-pro-qual-rom-a-…
manual unlock do bl - http://en.miui.com/thread-202290-1-1.html
ferramenta unlock antiga - http://xiaomitips.com/download/mi-flash-unlock-tool/
instalar adb e tudo o resto em 15s - https://forum.xda-developers.com/showthread.php?t=2588979
possivelmente? - fastboot oem unlock-go
download rom - https://xiaomi.eu/community/threads/7-4-13-14.39618/