I’m not sure compatability is the issue. When researching the problems on the forums, I found the following post:
On my X750, I can remove the internal sim card and connect automatically on reboots by changing glconfig to modem 1-1, using the same modem from the Opal . When I use the USB to mini-pcie enclosure on the X750, the modem name and IMEI are blank, but the IP information is present and it connects and surfs normally on reboots, just like the internal ec25-af.
I noticed another post where GL support recommended adding gl_modem auto-connect & to rc.local to fix an auto connect issue. Are you aware of any GL or Openwrt commands that I can use to “abort” the auto connect, then use gl_modem -B 1-1 connect serial /dev/ttyUSB3/0.0.0.0 VSBLINTERNET?
My only goal on the Opal is to not have to login to the GL GUI and click “abort>manual setup>apply” on bootup/reboot.