Disabling VoLTE in MM

[Renat Khalikov]

Hello ModemManager community,

I am looking for a way to disable VoLTE on my modem using ModemManager. I’m
running on a custom Yocto-based embedded device and using a data-only SIM
to establish cellular connections. My setup details are as follows:

*Modem Model/Chipset*: Cinterion PLS83-W

*Operating System/Distribution*: Latest Yocto version 5.2

*ModemManager Version*: 1.22.0

*QMI Tool Version*: 1.34.0

The modem is configured to use QMI

I’m specifically trying to disable VoLTE either via ModemManager commands,
QMI/MBIM tools, or through configuration. I haven’t found any direct
documentation about this for my specific modem. Is there a recommended
approach in ModemManager for disabling VoLTE, or do I need to rely on
vendor-specific AT commands like: AT^SCFG="MEopMode/IMS" and AT+CEVDP (or
something else)?

Any insights or suggestions are greatly appreciated. Thank you for your
help!

Best regards,

Renat Khalikov
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