Your computer will answer device inquiries as long as it is running hcid with an enabled iscan option. To disable responses, use this setting:
To test for device visibility, use hcitool to list the device addresses and friendly names of visible devices in range. Keep in mind that the computer running hcitool won't be part of this device inquiry, so you may need to try the device inquiry from an impartial computer. Here is a device inquiry:
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Read how to maintain and repair any desktop and laptop computer. This Ebook has articles with photos and videos that show detailed step by step pc repair and maintenance procedures. There are many links to online videos that explain how you can build, maintain, speed up, clean, and repair your computer yourself. Put the money that you were going to pay the PC Tech in your own pocket.