I agree with your other responses on wifi + VOIP. But I am not a fan of the non-kyc SIMS and never recommend them.

They are too easily compromised and linked by the users behaviors.

Tower triangulation is permanent history. It’s logged, stored, and retroactively searchable. Even non-KYC SIMs don’t help if your social graph doxes you passively.

They are a illusion of safety for people who don't really need that level of threat protection and too big a risk for those who do need it.

Compartmentalization is the easier and safer route.