What a lot of people do, including me, is use their mobile phone as a wireless access point. Mobile LTE sppeeds are good enough now to support at least minimal internet access. But hotels, who have historically overcharged for internet access, find this to be unreasonable competition. So they've been blocking the signals. This turns out to be against the law, at least in the U.S. (and probably in most places). This is good for students, and not so good for people who are trying to control access (like schools). Just don't tell them about Firechat. It may be too much for them.
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