iface wwan0 inet manual
     pre-up ifconfig wwan0 down
     pre-up for _ in $(seq 1 10); do /usr/bin/test -c /dev/cdc-wdm0 && break; /bin/sleep 1; done
     pre-up for _ in $(seq 1 10); do /usr/bin/qmicli --device-open-qmi -d /dev/cdc-wdm0 --nas-get-signal-strength && break; /bin/sleep 1; done
     pre-up /opt/modem/qmi-network-raw --profile=auto /dev/cdc-wdm0 start
     #Nice but only available in later versions of the qmi-cli command, shows IP settings assigned by cellular provider
     #pre-up qmicli -d /dev/cdc-wdm0 --wds-get-current-settings
     pre-up udhcpc -i wwan0
     post-down /opt/modem/qmi-network-raw /dev/cdc-wdm0 stop

