firmware is EC200TCNDAR02A13M16 (is it too old? need you provide a new one?)
works ok in Shanghai unicom, but not in Beijing
The mode is ECM, and OS is Linux
when i input AT+QICSGP=1,<1,3>,“uninet” ,only ipv4
when i input AT+QICSGP=1,2,“uninet”
it returns QNETDEVCTL ERROR, and no address: 0:0:0:0:0:0