Meh, your smartphone is already the ultimate spying device that comes with microphones and triangulates your location from 3 cell towers. The government doesn’t need more spyware than that.
My GrapheneOS Phone is pretty safe and I only use my cellphone connection when I have to, thank you for your concern. Event than, it's still a difference between a battery powered device on a metered connection with tiny microphones vs a literal microphone array connected to a hardline.