Thankfully only the nearest cell tower location. Apps and malware that use your phone’s GPS are much more dangerous…
The technique used by the Circles snooping tech is known as Signaling System 7 (SS7) exploitation, a powerful yet difficult-to-detect tool in government spy arsenals. It’s named after the portion of the telecoms network that deals with cross-border functionality and billing. When, for instance, you travel to another country, the SS7 network is used to move your phone over to a partner telecoms provider and adjust billing accordingly. But should a surveillance vendor have access to SS7 networks, either via hacking or acquiring it, they can send commands to a subscriber’s “home network” falsely indicating the subscriber is roaming. That will, in turn, reveal their location, though only the coordinates of the cell tower closest to the phone. It may also be possible to intercept calls and texts through SS7 exploitation…
https://www.forbes.com/sites/thomasbrewster/2020/12/01/this-spy-tool-can-find-you-with-just-a-telephone-number-and-25-countries-own-it-warn-researchers/
