How will I know if my phone is being tracked?
How will I know if my phone is being tracked?

Can the police track your phone if its off?

Moreover, phone location can be tracked using cellular data by a method called triangulation of signals. So, yes, your phone can still be tracked if location services are turned off, assuming other things are still ON.

How long do you have to be on the phone to be tracked?

Tracing a Cellphone Call Rules issued by the Federal Communications Commission in 2015 require wireless telecom companies to provide a "dispatchable location" (a physical address including information such as floor, suite or apartment) to 911 call centers within 30 seconds, regardless of indoor or outdoor location.