List AT commands for Huawei 3G modems. my huawei modem e3276s-920, now disapper the port, i try to set again and again but this is waste the time, but if insert the sim card the led green become violet, i cannnot set the firmware and dashboard becauce it cannot find the port.

The procedure is working with a Huawei modem I've also been using, so I'm sure that it's a bug related to the Telit modem. To send the USSD code I'm using mmcli ( --3gpp-ussd-initiate=*101# ). Furthermore I'm running ModemManager (version 1.8.2) in --debug mode, so I can trace what's specifically happening.