Yes, this is exactly the effect I am talking about. You go into the store, and effectively, using the cell network for data goes to zero, but the cell voice ser

Yes, this is exactly the effect I am talking about. You go into the store, and effectively, using the cell network for data goes to zero, but the cell voice service still works. Could it be something that makes the cell network jittery or adds latency that interferes with cellular data but not voice service?