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Why is there only one bar of optical modem WiFi signal across the wall? You'll know once you take it apart and look at it: The built-in antenna, low transmit power, and being stuffed into a metal weak current box are the inherent shortcomings of the hardware layer. This article describes the whole process of helping my mother-in-law’s home WiFi rescue signal. Four tricks ranging from zero to dozens of dollars, and a stop-loss line for when to give up and stop fussing. ...