All these years I was thinking like to get device location, android phones connects to nearby cellular towers or wifi. But recently I found another option in Settings > LocationMethod > "Phone only". Once I set LocationMethod as "Phone Only", I turned on the "Flight Mode"(No wifi and No network. Then I turned ON the Location Services & Opened Google maps and its able to find my current location when I'm outside the building.
I did the same thing inside my home and it couldn't show my current location. So is my android device really connects to satellite to get my location? If yes, how can a small & low power device send and receive signals to a satellite which orbit above 100km high, when it struggles to get a signal from a cell tower which are few kms away?