ModemManager - Access Technology vs ModemCapability

[Aleksander Morgado]

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