Hi Bugs Team, I am also experiencing the same libqmi error (64) when trying to connect to the Internet using my Sierra Wireless MC7700 and the latest libqmi-utils 1.16.2-1 version.
root@vanputer:/home/bvd# qmicli -d /dev/cdc-wdm0 --wds-start-network="apn=broadband" --client-no-release-cid error: couldn't start network: QMI protocol error (64): '(null)' [/dev/cdc-wdm0] Client ID not released: Service: 'wds' CID: '2' root@vanputer:/home/bvd# qmicli -d /dev/cdc-wdm0 --wds-start-network="apn=broadband,ip-type=4" --client-no-release-cid [/dev/cdc-wdm0] Network started Packet data handle: '41221944' [/dev/cdc-wdm0] Client ID not released: Service: 'wds' CID: '4' For some reason the ip-type=4 is required now in the --wds-start-network command and it's not called for in the qmicli I also had to modify /usr/bin/qmi-network start_network() subroutine as follows: START_NETWORK_ARGS="'apn=$APN'" before the placement of quotes was incorrect and qmicli wasn't accepting the argument with the two values. Thanks so much for this great collection of packages and software and hopefully this helps someone out in the meantime while patches make their way to new distros. Happy Open Sourcing! -Brent