Firmware for Duo 2 LTE

Jacobo

I am trying to update the firmware on a Solar powered duo2 LTE
the unit will not connect to local cell service.

I updated the APN cell provider with the "my_custom_apn.txt" file.
the updated APN setttings is recognized and accepted on bootup of the unit, as stated on the speaker during bootup.

Apparently the DUO 2 LTE firmware is programmed for US LTE bandplan.

i need to load the European LTE bandplan/firmware version for it to recognise the
WCDMA -> B8/B1
LTE -> B3/B20/B28
channels

looking for the European firmware version to change the bandplan used.
who can help me??
it is URGENTLY NEEDED for a nature conservation project in Aruba