Registration status is showing as registered but ping fails

[Tamilarasan]

I’m using the EG915Q-NA cellular module from Quectel with Supersim from Twilio
In my application when I try to establish an mqtt connection, I see that the module logs are showing CGREG/CEREG status as registered and
CEREG: 0, 5
CGREG: 0, 5

AT+COPS also shows the connected carrier name as Verizon
+COPS: 0,0,"Verizon Wireless",7^M

But When I try to establish an MQTT connection or use ping 8.8.8.8 fails

When I discussed the same with the Twilio team, they checked the state of the SIM at that particular instance and shared the following

So their final message is that SIM is getting deregistered but from the module side, it is showing that it is still registered.

I want to know whether is it possible? The value update we got through AT cmd should be a real-time value right? If yes Why I’m seeing two different states one from SIM log another from module log?

[herbert.pan-Q]

According to my judgment, the deregistration you refer to may be that EG915Q did not complete the whole process during the registration of the network, maybe you need to configure the APN and then try to set up MQTT business

[Tamilarasan]

Hi @herbert.pan-Q,

Thanks for the reply.
From my device side, it can connect to the network(APN is configured already) and can ping also. But after some time (a few seconds) if I try the ping fails as well as the MQTT connection script.

You can refer to the below sheet for the module log events with device log

cellular offline issue eg915q-na

[herbert.pan-Q]

I suggest that you can contact the carrier’s core network to grab the packet for analysis