EM160 lte1 mbim: error: >>> error: 13

Exactly every 4 hours the EM160 disconnects , the internet line is interrupted and the IP number changes , showing this error lte1 mbim: error: >>> E service: connect, command: connect, error: 13.
I thought a disconnection of the isp, but the same sim inserted in another modem maintains the connection even for days.

Thanks for your query in Quectel forums.
Is the firmware version of these two modules the same? Please share the query firmware version number with me, thank you.

the version of my firmware is EM160RGLAUR02A05M4G, I have read on several forums that the problem is due to the isp and the routerboard I am using (RBM11G) so I can put it solved. tnx