Modem won't register?

[nelstomlinson]

Several times now I have found that the modem loses registration, then won't register.  Once I solved it by flipping the modem switch on the back off and back on, then rebooting. Once I have solved it by merely rebooting. 

Running mmcli -m any --3gpp-scan times out, whether the modem is registered or not. When not registered, running mmcli -m any --command='AT+CREG' returns ' '. Similar results trying to do it through modem-manager-gui.

This is on a PP beta edition, Mobian Bookworm/Phosh, haven't changed the modem firmware from what it shipped with.

Any ideas what might be causing this intermittent issue, and how to stop it?

Edited to add: Settings and modem-manager-gui agree that the modem isn't registered, but I still have data, can ping google.com. I am using a Pure Talk SIM.

[3Gluddite]

Several times now I have found that the modem loses registration, then won't register.  Once I solved it by flipping the modem switch on the back off and back on, then rebooting. Once I have solved it by merely rebooting. 

Running mmcli -m any --3gpp-scan times out, whether the modem is registered or not. When not registered, running mmcli -m any --command='AT+CREG' returns ' '. Similar results trying to do it through modem-manager-gui.

This is on a PP beta edition, Mobian Bookworm/Phosh, haven't changed the modem firmware from what it shipped with.

Any ideas what might be causing this intermittent issue, and how to stop it?

Edited to add: Settings and modem-manager-gui agree that the modem isn't registered, but I still have data, can ping google.com.  I am using a Pure Talk SIM.

I'm not sure that you're describing the same problem that I had, but in case you are, give this a go:

In terminal, run 

Code:

sudo systemctl stop eg25-manager

wait 10 seconds or so (the screen might start flickering; wait 'till it's done) then run

Code:

sudo systemctl start eg25-manager

Assuming you have the same problem as me, your modem should reconnect around 30 seconds after this. If this does the trick, try reading https://forum.pine64.org/showthread.php?tid=14099 and https://forum.pine64.org/showthread.php?tid=13885 to learn about the problem and a workaround.