Possible to use JF on a mobile hotspot?

[TheDreadPirate]

 "should be giving you a proper IPv6 address so CGNAT on IPv4 can be worked around through IPv6." How exactly does this work, and what's the benefit?

Just thinking out loud just in case I was wrong about there not being CGNAT for T-mobile's network for IPV4.  TLDR; if you had a CGNAT'd IPv4 address, but a proper IPv6 address you could point your domain or VPS to the IPv6 address and not have to worry about the CGNAT.

While on the topic, do you know if a Xfinity hotspot (that you need to login to a Comcast account to use) could be used? Had the same issue using that, and would prefer to use that if possible so we don't eat our own mobile data up.

No idea.  Pretty sure Xfinity Mobile is just Verizon.  My main concern with both T-Mobile or Xfinity is their TOS and potentially violating them.

 
I do have a VPS & domain name that I use so I can tell people to go to "jellyfin.website.com" instead of giving my IP out, if that could help at all. 

When you are at home, do you use your domain name/VPS to access your jellyfin?  Or do you just use the local IP?