linux – Network-Manager automatically disconnects after 20 seconds

I have a Quectel EG25-G setup but whenever I connect (right after a reboot) it connects for 20 seconds and then disconnects. It happens at the Jun 24 04:59:32 linux NetworkManager[5093]: <info> [1656046772.4569] device (ttyUSB2): state change: activated -> failed (reason ‘modem-no-carrier’, sys-iface-state: ‘managed’) Jun 24 04:59:32 linux NetworkManager[5093]: <warn> [1656046772.4677] device (ttyUSB2): Activation: failed … Read more