Permanently set modes for QMI modem

Hi, When trying to set the allowed modes (4G only in my case), the setting doesn't seem to persist across power-cycles of the modem. Is there a way to make this setting permanent or reset it every time the modem state machine is brought up by ModemManager (perhaps a simple external script, bu

Debugging VoLTE issue: BM818 (Librem 5 Modem), MM 1.18.6

Hello! I am trying to debug a VoLTE issue with the BM818. I am using T-Mobile USA with VoLTE enabled on the BM818, with a Librem 5, PureOS Byzantium (based on Debian Bullseye). With certain numbers, I have seen that the call terminates right after the call is picked up. However, With the same