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...broadband connection running on my Lenovo T420. But NetworkManager doesn't seem to connect. I ran through the wizard for mobile broadband connections but it doesn't work. The Ericsson f5521gw seems to run with cdc_ndm module. I also installed modem-manager-gui and unlocked my sim by using mmcli. But still NetworkManager can't establish a connection. I also can't delete connection out of the NM-GUI so I needed to remove them from /etc/NetworkManager/system-connections. Did I miss something? The logs seem to be fine so far. My CentOS 7 has all recent updates applied. Thanks in adva...