Re: eh? @RAMChYLD
Unfortunately, cell phones have to advertise where they are and be tracked, so calls can be routed to the cell where the phone is. There's no way the 'phone system could probe the cell network of the whole world to locate a phone.
So it's axiomatic that a functioning mobile phone can be tracked without GPS, WiFi, NFC or Bluetooth.
The difference is that the cell location information is normally limited to the service providers running the cell network, and agencies with legal access to that information. The combination of WiFi/Mobile Data and GPS/AGPS makes this type information available to all apps with some tracking function.
I run will all comms except the phone disabled, but mainly because of battery life.