Hi there, 

I am using the MR-6400 to connect a Ring security system and cameras and everything has been fine up until a few weeks ago. 

Every night starting from 10pm, my Ring alerts go off to say that the security system has gone into mobile back up meaning it's lost internet connection. When I look at the cameras, it has indeed no connection. 

This could happen anywhere from 2 - 8 times a night. 

I have looked at the logs and there's no much except these errors that appear now and again. 

ERROR: Verbose Call end reason = 50, type = 6.

ERROR: 0x00000047 QMI_ERR_INVALID_QMI_CMD

There also doesn't appear to be logs that coincide with all the incidents. I'm not sure if this is the router restarting itself? 

As I said, connection is only dropping at night, I have read in other places that could this be to do with the carrier towers dropping our connection on purpose as it's not needed?

I have since changed the network mode to 4G only but just wondering if anyone has any further help or reasonings to why this could be happening?

Thank you!