Hytera change PD780 region to PD785

Do you know how to change PD780 region to PD785? I have a chinese unit and is driving me crazy. I know how to modify CPS to read/write the radio, but i want to modify the radio region itself.

Digital Ham Radio / Amateur Radio

Digital Ham Radio / Amateur Radio
DigitalHamRADIO@groups.io
https://groups.io/g/DigitalHamRADIO
******  share this with others  *******

AMATEUR HAM RADIO

AMATEUR HAM RADIO

Amateur Radio Users Support Group

AmateurRadio@groups.io
https://groups.io/g/AmateurRadio 
******  share this with others  *******