Yes, I'm Portuguese. Here in Portugal the 4G band 20 is used in the rural areas. With Redmi Pro you can only get 4G connection in the cities.
I live in a rural area but the 3G connection is good enough for my needs.
I just followed these instructions: https://xiaomi.eu/community/threads/7-1-12.37476/ under "ROMS for devices with locked bootloader"
Enviado do meu Redmi Pro através de Tapatalk
I also have a Redmi Pro that came with such 'fake' ROM.
My bootloader was locked, so I requested Xiaomi to unlock. After unlocking I just went ahead and flashed twrp and from twrp I installed the latest stable ROM from Xiaomi.eu (8.1.2.0)
All is working just fine.