Why does GPS work when underground and under big buildings but radio signals, Wi-Fi, and cell phone signals struggle?

Question

Why does GPS work when underground and under big buildings but radio signals, Wi-Fi, and cell phone signals struggle?

In: 4773

Answer 1

Also your phone used a standard ping from cell towers to triangulate position. It’s not using GPS. My understanding is there is a standard frequency that allows all phones to Ping every carriers towers so all carriers benefit from enhanced positioning data for their users