Hi @coastalbrandon, in another thread you also mentioned that this happens after some period of connectivity. Is that always the case? If the loss of registration occurs after a long period of normal connected operation, is there a consistent timing to when the drop occurs (eg. after 12 hours of connectivity)? Do you know if these particular devices have always had this behaviour? Is connectivity restored immediately if you power cycle the modem? How long have you observed the device in this rejected state, and does it ever recover automatically?
Regarding the lack of signal strength, @davidc has a good suggestion, but in case that’s intermittent, it might be indicative of the “rest” time the modem takes between full network scans, when unable to successfully register. I notice the first post had a strong signal. For power savings, the modem won’t maintain a constant full network scan, since conditions are not expected to change instantly. I think the full scan will occur after about 45 seconds of this rest time, during which I think 0 signal strength will be reported (since there is no active signal monitoring).