xox without a SIM or Google: the complete guide

xox never asks for a phone number, an email or an account. That makes possible something almost no messaging app allows: using it on a phone that has no SIM, that has never signed in to Google or Apple and that has never touched an app store. Such a phone has no number to track, no account to subpoena, no advertising ID to sell. This guide explains how to set it up and what each step buys you.