What is the main difference between QCM and QMI protocols? Which one should I use for a 4g router
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QMI is a standard protocol that various modem use.
QCM is for quectel modems. Supposed to be better compatible with Quectel modem but I have no more info.
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Has anyone figured out what exactly it's for?
For me, it was always set to QMI. It worked everywhere. Now, in Belgium, it only works if I set it to 3G; otherwise, the router doesn't connect to the mobile network.