your phone can be activated remotely, it is called a roving bug and has been used for years, the only way to disable it is to remove the battery, most phones since 2012 no longer have a removable battery
https://www.cnet.com/news/fbi-taps-cell-phone-mic-as-eavesdropping-tool/
The technique is called a “roving bug,” and was approved by top U.S. Department of Justice officials for use against members of a New York organized crime family who were wary of conventional surveillance techniques such as tailing a suspect or wiretapping him.
Nextel cell phones owned by two alleged mobsters, John Ardito and his attorney Peter Peluso, were used by the FBI to listen in on nearby conversations. The FBI views Ardito as one of the most powerful men in the Genovese family, a major part of the national Mafia.
The surveillance technique came to light in an opinion published this week by U.S. District Judge Lewis Kaplan. He ruled that the “roving bug” was legal because federal wiretapping law is broad enough to permit eavesdropping even of conversations that take place near a suspect’s cell phone.
Kaplan’s opinion said that the eavesdropping technique “functioned whether the phone was powered on or off.” Some handsets can’t be fully powered down without removing the battery; for instance, some Nokia models will wake up when turned off if an alarm is set.
That’s how the Deep State works, if they can get a crack they can open it wide open then mainly the law abiding citizens have loss of privacy.
Removing the battery doesn’t do it anymore. They got capacitors for that now.