You are... Wrong again :/

From Wikipedia

Mobile phone tracking is the ascertaining of the position or location of a mobile phone, whether stationary or moving. Localization may occur either via multilateration of radio signals between (several) cell towers of the network and the phone, or simply via GPS. To locate a mobile phone using multilateration of radio signals, it must emit at least the roaming signal to contact the next nearby antenna tower, but the process does not require an active call. 

I recommend you to read the "Privacy" section of that Wikipedia article.

You should also watch this video

This one

This one:

And also learn about the SS7 vulnerability:

Signalling System No. 7 -

Protocol security vulnerabilities
Several SS7 vulnerabilities that allow cell phone users to be secretly tracked were publicized in 2008. In 2014, the media reported a protocol vulnerability of SS7 by which both government agencies and non-state actors can track the movements of cell phone users from virtually anywhere in the world with a success rate of approximately 70%

SS7 hack explained: what can you do about it? | Technology | The Guardian -

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