Thanks, so what I found it, the mobile iterface goes up, however, pings fail:
Fri May 5 13:41:21 2023 daemon.err mobifd: IPV4 ping failed for "mob1s1a1"
Fri May 5 13:41:41 2023 daemon.err mobifd: IPV4 ping failed for "mob1s1a1"
Fri May 5 13:42:02 2023 daemon.err mobifd: IPV4 ping failed for "mob1s1a1"
After they fail, the device determines the interface is down and restarts it, the one thing I am no sure of, is what it tries to ping.
When the modem is up, do you have an internet connection for that time?
Maybe you could capture traffic to see what it pings and try to see why the pings fail