huawei mate 8 chines version probleme with enable 3g/4g

hi i have huawei mate 8 nxt—cl00 chines version i try to use moroccan sim cart it work but just 2g can’t enabled 3g/4g !! i try with unlock with sigma stil same probleme ! i try to root device and write oeminfo from a10 phone but stil can’t enable 3g/4g !!:confused::confused:
any help ! pls :rolleyes::rolleyes: