I was using my 5G router setup with Vanilla OpenWRT and QMI Cellular as a protocol for quite some time, but there were irregular disconnections etc. Updating the firmware of the modem didn’t help. Some days ago, I noticed that it’s also possible to configure with Modem Manager (which provides connection information directly in LuCI) and put the Quectel modem into MBIM mode. It’s running without hiccups now! Also updated to OpenWRT 24.10.