Will GPS device work inside the building?

A GPS works better when the device has a clear line of sight to the sky. The more GPS satellites that your personal device can access, the more accurate it is. When inside, there is often no direct line from the satellite signals to your device. The signal weakens or distorts as it travels through the building to your GPS, and the result is inaccurate operation.

The construction materials in a building affect how well a consumer GPS device will work inside. If you're in a house and stand near enough to the windows, or if you're in an office tower with large windows, your GPS could still work. GPS signals pass through glass much more easily than they do through thick, solid materials such as brick, metal, stone or wood.

GPS device may not work inside the building, because of signal absence with GPS satellites. It’s always recommended to take it out or put in to the car for accurate operation.