I am running 4G LTE managed by ofono version 1.30 and connman version
1.37, it works well most of the time, but occasionally, the 4G modem
is connected, there is no IP address so I have to run systemctl
restart connman to bring the IP address back. As it is intermittent
and random, it is hard to debug, any insight advice what I could be
missing, why couldn't connman pick up the 4G LTE IP reliably?