Hi Ben,
We have fixed the issue with hotspot mode when the SIM card is inserted in the v2.23.4 dev release. It’d be nice if you’ll be able to test it to check if the hotspot with the inserted SIM card works as expected.
Please note, it is currently not possible to share mobile data over Wi-Fi to a phone/tablet in this version.
Please note that dev versions are mostly used for testing purposes and not intended for use for real field projects. Also, once you update to the dev version, returning to the stable release will require the reflashing of the unit.
This fix will make it into the stable branch in one of the next updates, so you can wait until we push the stable to check if it resolves the issue.