I know that it is possible to get SIM cards without registration in the UK or Czech Republic, unfortunately, this is not possible in the country where I live. 

I bought my phone in an apple store with cash without KYC.

The thing is that I have this one phone, and even with eSIM, my phone has a unique identification number registered by the mobile operators (this IMEI), so they essentially see this number around my home, work, other places. Based on these patterns I could be easily identified. Solution could be to use multiple phones and eSIMs, but who would do that?

oliverweiss

I am in Canada. I will do some research. 

grayruby

The Freedom Tech Stack

If you connect to a mobile network, you can be pseudonymous at best as your number is known. You can use WiFi at public hotspots or an eSIM bought anonymously.

I don't know about where you are, but in the UK you can buy a physical SIM card without KYC. And a used phone bought on eBay is KYC free too, but the seller knows the address and name it was sent to.