the company equipment. The only thing that comes into play then is the misuse of company time for personal purposes which has a well established set of precedents to allow them to come down on you about it.
However, I do know of one organisation that has a few special items of equipment set up around their building that ensure no usable wi-fi signal is received inside the building. It's one of their security measures to ensure people don't use wi-fi to send out restricted access corporate data. If you want to use a mobile phone you have to leave the building and walk about twenty-five feet away from it, and that's noticeable.
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