Chateau it doesn't work in lte

hi I’m new and I don’t have much experience of mikrotik.
i have a 12 lte chateau and with a windtre card i can’t navigate in lte while if i select only 3G it works.
the modem was supplied with 7 beta 06.
I updated to 7 beta 08 and also the firmware of the lte modem to EG12EAPAR01A06M4G but it doesn’t work.
the APN is correct.
what can I try thanks ..

Hi!
I just bought Chateau lte12 too, and it worked on my Wind3 sim with firmware 7beta08 and modem firmware EG12EAPAR01A05M4G.
How do you upgrade modem firmware? i always get an error after download it.

there is a bug and APN does not get sent to the modem… you can send it directly with AT commands, then it works

https://forum.mikrotik.com/viewtopic.php?f=1&t=163231&p=806080#p805012

Resolved

By default MBIM modems in LTE network use the networks provided APN ignoring the manually set one. With some SIM cards the modem can receive an unexpected APN from the network. To resolve this add use-network-apn=no to the APN profile.

CLI commands to accomplish this (replace “internet” with your APN):

/interface lte apn add apn=internet use-network-apn=no

/interface lte set lte1 apn-profiles=internet

If this does not work then please enable lte debug logging and send us the supout.rif file from your device after you have rebooted it and waited for 5 minutes before generating.

LTE debug logging can be enabled trough CLI by issuing this command:
/system logging add topics=lte,!packet

https://help.mikrotik.com/docs/display/ROS/LTE#LTE-Modemfirmwareupgrade

This did not work for me. However, sending the APN once via AT chat worked . I just rebooted the router and the setting is preserved.

Rick