Cell spot interfering with regular wi-fi

What I would suggest doing is running a speed test with the cell spot plugged in and without it plugged in and seeing if there is a difference. I would also make sure that you have enough bandwidth to support streaming on multiple devices. There is always a chance that a device on the network is doing updates like a computer as a example which would use some of your limited bandwidth and could be the cause of your issues.

The cell spot how ever is unlikely to be the culprit unless other people are useing the device to stream video and such. As things stand there are to many factors for me to peg a issue but I would start with the basic trouble shooting steps, including powering off the router for 40 secs and then turning it back on. Hope the info helped./