mobile

I ve got a question,
Have a mi3, which is a bit modified..
cpuz tells me :
cpu: qualcomm snapdragon 800
model : MI3W (Pisces)
Manufactor xiaomi
board Pisces
bootloader unknown ,
Build Id JLS36C
Hardware mt6582
android 4.3
API LEvel 17

all these datas seem very strange, dont fit together.
I cant flash any new rom .
any idea where i should look for the rom . and how can mi3 W be pisces?
thanks for your help.