Yes, but its quite unfortunate in that you cannot do what you want with the data you pay for. Even in plan which not unlimited when I buy in visiting USA, I cannot even use the x GB I purchase without restriction.
I should not need to resorting TTL „unsupported hacks“ which also say company will ban me for.
Eh? What I pay for with my cheap-shit cellular connectivity is to use as much data as I wish, either on the phone itself and/or for exactly 1 hotspot-connected device, at speeds of up to 5Mbps for that singular hotspot-connected device. I can stay within the operating parameters of the service I signed up for by using up to 5Mbps with hotspot (along with literally-unlimited[1] bandwidth on the phone itself) all of the time, 24/7.
I absolutely do get what I pay for, and I absolutely do what I want with it, and let me tell you: I am not paying very much. I have nothing to complain about here.
But I am not alone when I occasionally extend that to more than one device (using a router), and/or using TTL mangling to negate the 5Mbps limit. I've never witnessed anyone being banned for this (and I've paid close-enough attention to the noises people make that if banning were a common thing, I'd have seen the screaming at least one time by now).
Indeed, some people (in some areas, with some devices) don't seem to have either 5Mbps nor 1-device limits on their phone's built-in hotspot -- without any hacks at all.
And while I have used it (and hacks to improve it) rather extensively at various times and for various reasons, I don't typically use it as a primary Internet connection at home:
While my (also inexpensive) DOCSIS connectivity at home is often slower than what my phone can provide on a given day, I prefer the stability and consistent latency of DOCSIS compared to using my phone's hotspot, and I like having my home LAN always-connected regardless of whether I am at home or not, and also I enjoy having my phone's battery last for days instead of hours between charges (wifi hotspot is a huge battery suck on a phone).
In terms of visiting the States: I don't know what to tell you. I've lived here my whole life so I don't ever travel to the US, but this service is not really intended for visitors. It can probably be made to happen with the help of a friend who does live here, but I don't think anyone but you was ever trying to address any issues of visiting the US here in these threads.
Is there a particular aspect about that concept that you'd like to more-thoroughly address?
I can answer questions.
[1]: Everything has limits, and bandwidth cannot ever be infinite, so "unlimited" is with a grain of salt.