Hologram with Nova U201 and Raspberry Pi - periodic connectivity


As the subject says, I am loosing connectivity to local cell network after some time. After boot up of the Pi, the Nova shows red power led, with blue blinking status led indicating available cell network. On boot up I have a script that runs to initiate connectivity and so cell connectivity is established readily, with blue status led turning solid.

After an hour or two, the cell connectivity appears to drop and despite using 'hologram connect -v" and ‘hologram modem status’ I cannot get reconnected even though I have cell connectivity with my personal phone. At this time the blue led is completely off.

Aside from rebooting which appears to clear up the situation, are there some other commands that I can use to confirm the pi can see the connected Nova U201 device?