It works by taking an LTE connection and converting it into a wi-fi signal that your laptop or smartphone can use. No it cannot be a stand alone product. Essentially they work just like a phone does in the sense of connectivity to phone towers. If the building itself struggles to get service, it’s highly doubtful you’d get any better with a hotspot unless the hotspot IS a different carrier and that carrier specific can get service there. Does the building have a metal roof?
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