Hey, > > The device I am using has a Cinterion® EXS82-W built-in and I am noticing > some weird behavior when it comes to Access Technologies and > ModemCapatibiliy, IMHO it doesn't make sense, but I guess I am wrong > somewhere and would like to know where. > > Reading the AccessTechnologies property > > busctl get-property org.freedesktop.ModemManager1 > /org/freedesktop/ModemManager1/Modem/0 org.freedesktop.ModemManager1.Modem > AccessTechnologies > u 16384 > > The value 16384 should correspond to MM_MODEM_ACCESS_TECHNOLOGY_LTE. > > Reading the SupportedCapabilities property > > busctl get-property org.freedesktop.ModemManager1 > /org/freedesktop/ModemManager1/Modem/0 org.freedesktop.ModemManager1.Modem > SupportedCapabilities > au 1 4 > > The value should correspond to MM_MODEM_CAPABILITY_GSM_UMTS. > > Question > > How can it be that my modem supports only GSM/UMTS from the general access > technology families, but at the same time it is using the LTE technology when > registered with or connected to a network? >
This is definitely a bug when reading supported capabilities. Could you open a new bug in gitlab and attach MM debug log to see what's happening? See * https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/new * https://modemmanager.org/docs/modemmanager/debugging/ -- Aleksander
