Hi, I have the Redmi 3 and the firts I did it was install the stable of xiaomi.eu. Then I tried to install the developer but I can't, neither for updater neither for fastboot, for fastboot the MiFlash say me with and Error that the bootloader is locked. I tried to install for fastboot the offical stables miui then pass to a officail developer or xiaomi.eu. But I can't. What I can to do, can anybody help me please. Thanks!