getting internet using networkmanager in linux based yocto

I installed modemmanager and networkmanager in linux based yocto . but i am not able to connect internet

 follow commands a below :- 1) systemctl start Networkmanager. 2) systemctl enable Networkmanager. 3) mmcli -L 4) mmcli -m 0 -e 5) nmcli connection edit type gsm con-name "My GPRS Connection" 6) nmcli > set gsm.apn internet 7) nmcli > save

in networkmanager status command i am not getting ttyUSB2 interface for quectel module.

pleae help.