I’ve tried to update/upgrade the stretch version to buster and wifi card stop working. I’ve tried to compile but seems that bintray.com (where /balenaos/raspbian files are) is not working anymore redirecting to Center Sunset | JFrog ?! So can’t compile or rebuild any of the .so or merge. Neither the script on your github works due to that ( GitHub - balena-os/balenafin-raspbian: Raspbian support for balenaFin ) failing with “forbiden”.
I need the upgrade otherwise SIM is not working (it did work after upgrade…but no wifi. I need both).