How do I connect a T-Mobile Cellspot to the CM1100?

After hours of tech support, I was told the CM1100 can't be accessed to open those ports. And since the cable provider (Comcast) does not own the CM1100 (I purchased it on my own), they could not open or close anything. The only option on the advanced page after accessing the CM1100 through the computer, is to Disable or Enable Aggregation, which does not help in this situation.  However, what I ended up doing after multiple power off and power on attempts, was to connect the TMobile Cellspot to my Orbi mesh network (RB50 Version 1) which is connected by ethernet from the CM1100, and the TMobile Cellspot was able to finally connect to the internet, download the required software, and is working like a champ!  I went from 1 bar to 5 bars! 

When I first attempted this (because there are 3 extra ethernet ports on the RB50), the TMobile Cellspot was not connecting to the internet through the Orbi RB50, so I then went directly to the CM1100.  Kinda like a dog chasing it's tail!  I hope this helps anyone else trying to connect their TMobile Cellspot's.  The tech support people did say customers are encountering a lot of problems connecting the Cellspot device to routers!  Good luck!