Why is my phone's GPS inaccurate when I drive?

Episode 1623 (41:17)

Danny from Prescott, AZ
Samsung Galaxy Phones

Danny called last week about his phone's GPS lagging behind where he actually was. His wife recently figured out what was wrong, and that was the metal mesh that supports the rearview mirrorĀ attached to the windshield was causing interference. When he moved the phone to the left side of his windshield, the GPS was suddenly accurate again. Leo says that makes sense. The Mesh is causing a kind of Faraday cage for that particular area of your dashboard.