[tcd]

delete your google account.

don't use android (or iOS really).

don't carry a smartphone.

I mean, it may seem inconceivable but you're not forced to carry a spy in your pocket =).

[jumpinalake]

Is this what you do?

[wizzwizz4]

It's what I do, and it's a huge inconvenience.

Instead, I recommend getting a smartphone known not to have dedicated spying hardware, replacing the OS with Lineage OS, installing F-Droid and microG (and perhaps Yalp, but only install apps from it if you really really need them) and then keeping it usually switched off (unless you need it on).