Queltec EC-21 has a race condition on modem initialization #25
Description
A hint could be the non-working selection of the Sim card:
Dec 12 13:51:15 ops-mfn-06 ModemManager[718]: <wrn> [modem104] (shared-quectel) failed to initialize SIM hot swap ports context: Couldn't get primary port
Dec 12 13:58:40 ops-mfn-06 ModemManager[702]: <wrn> [modem0] (shared-quectel) failed to initialize SIM hot swap ports context: Couldn't get primary port
Dec 12 14:04:23 ops-mfn-06 ModemManager[691]: <wrn> [modem0] (shared-quectel) failed to initialize SIM hot swap ports context: Couldn't get primary port