Modem successfully unlocked ZTE MF920VI
 

selection :
manufacturer - ZTE modems
model - Auto detect (recommended)

Found Applications port COM12
Found Diagnostics port COM13

Found modem : MF920V
Model : ZTE MF920VI
IMEI : 861376037102219
Firmware : BD_ETMF920VV1.0.0B03
Compile date / time : Jan 9 2018 14:55:00
Chipset : Qualcomm
NAND Flash : H9TA4GG2GDMCPR
SIM Lock status : Locked (Card Lock)
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Unlocking, please wait ...

Modem successfully unlocked !

Credits left : :) tanx DC-unlocker

Any idea how to put this modem in diagnostic mode?

how do i generate the ports for dc-unlocker

It has ports by default, if it appears under network adapters then it creates ports upon detection.

can you help me with the process you do to unlock ?

Were you able to detect it on DC-unlocker and could provide it's detect info? Or maybe you could just provide information of your device from it's dasboard - about device info section.