@AlanKav >if I schedule a daily reboot, will this reboot happen even if there is a drop in internet connection???? Yes, your MR200 will reboot even if you experience a connection drop; as long as...

Your MR6400 shuts down if it cannot detect a signal from the cellular network, but stays on if there's a strong cellular signal? That does not sound normal, the router should stay powered on, even if...

Just for the record, Microsoft Teams uses ports TCP 80/443 and UDP 3478-3481 as written here:...

Can you post the system logs from the MR6400? the logs might have something related to your issue

Advance -> Network -> Internet. Change the setting called "band" from "auto" to "manual", the router should scan the network for the available bands. Select at least 3 and save. Just in case, reboot...

Advance -> Network -> Internet. Under "Dial up Settings", change the network search function from "auto" to "manual".