Kenny33 Exactly correct. The phone is purchased with cash locally so no tie and the sim can be purchased locally with cash as well
Even so, one can't remain anonymous for long. But more importantly and I don't know about you, but I use my phone to do regular person things. Even if I had purchased it with cash (I haven't), my IMEI would become tied to me within a couple days in more ways than one. I have stopped being bothered by it. I keep my phone in Airplane mode 90% of the time and mostly treat it as an emergency device. In fact, I forget the very existence of it for days at a time.
Kryptos I understand that. I also use a prepaid SIM. But why swap them out instead of keeping using the the one you already have? It just makes you stand out like a sore thumb with IMEI whose IMSI changes on a regular basis, thereby attracting unwanted attention. Outside of accidentally misplacing your SIM card I can't think of any good reason to regularly put in a new one.