I'm in USA (isn't it assumed by default here?), in a city not very big but the capital of the state. I'm referring to "internet via 5G wireless phone technology transmitted from cell towers". I don't know which service provider has this service in the first place. AT&T? I have been on a call for a hour for a tech support of AT&T, but haven't got through yet.
Update: I got connected to a human tech support of AT&T at last after waiting for more than an hour. Then I took great pains to explain to her I'm not talking about hotspot, because hotspot is wifi, but about 5G. What I want is a USB device that can receive 5G signal directly just like a mobile phone (5G mobile phone doesn't need hotspot to do wireless communication), and subsequently transfer data with PC via USB port. Then she asked me to continue to wait to transfer to AT&T Mobile tech support. After waiting for nearly two hours, I was told: "The call center is closed. Please choose your option: 1: pay by phone, 2: blah blah blah ..."