The reason why “lease fail” is shown, is because dhcpc conflicts with udhcpc. Fixing this is simple; Add “denyinterfaces wwan0” to bottom of /etc/dhcpcd.conf. Then restart dhcpc “sudo systemctl restart dhcpcd”, followed by restarting qmi_reconnect “sudo systemctl restart qmi_reconnect” (or reboot).
@ensar, please add this part to the qmi setup script.
…Or if you want overkill, simply disable dhcpcd completely; “sudo systemctl stop dhcpcd; sudo systemctl disable dhcpcd”