24 channel from 32? / day 8/ unstable xfinity internet / power 14.3 dBmV / SNR 36.5db

From that article 

"The PML team found that, of the devices tested, nearly all set-top boxes and cable modems by themselves were able to handle 4G interference expected from typical cellular devices. But the cables, connectors, and signal splitters in a residential set-up can allow signals to leak into the signal path. Retail two-way splitters performed poorly, and half of the consumer-grade coaxial cable products tested failed – that is, had substantial signal errors – at or below the normal signal levels."

It later goes on to say: 

"Meanwhile, Ladbury says, improved consumer education and understanding could help minimize problems. "When the cable company installs cable in your house, they typically do it the right way and use quality components. The problem is that, once they leave, you have the freedom to change things – get a new TV, add a line splitter, run new cable, and so forth. And many consumers don't have the knowledge to make the right decisions in those circumstances."

So get decent connectors and cables if you feel that's the issue. There are shielded rj6 cables and higher quality ends/connectors. If the ISP is saying thats the issue, they're responsible for the signal up to the home. In the home, its on you. I've been doing this a while and never seen an issue from cellular broadcasts when everything is ran proper. 

You can find proof of anything if you google long enough.