I think it's imperative for anyone to understand that a mobile hotspot connection like a T-Mobile, AT&T, or Verizon that is a stock, commercial connection is not recommended for AllStarLink and it's increasingly unlikely people can "make it work". As we're continue to have an explosion of IP-connected devices to cellular networks, we're reaching a tipping point where even Carrier Grade NAT (GCN) connectivity is constrained and they're doing all sorts of various games and network optimizations to keep things working for web browsing and streaming.
The likely short term fix will be 44Net Connect which is a recently-announced service from ARDC. That will give up a public iP address and ability to use VPN up to that system seamlessly. Once I get access, I'm planning to work on some directions and scripting to do it "out of the box" (more or less) for ASL3 Appliances.
However the long-term fix is to take action on the plans to completely overhaul the registration and IP-directory-based system for one that is key-based. Then IP addresses don't matter and IPv6 connectivity will work as a native component.