All of their advice is pretty moot because they are saying you should have your phone with you and that alone is going to hit cell towers and put you at the location of the action.
Not so if you EMI tape the GOS phone case, disable USB-C except for charging, use second profile to encrypt your actual data so you can attest before decrypting, and keep it turned off and in aeroplane mode when not in use. See my comments.
Your phone going “dark” during an action is in itself a signal that you are involved in the action. Especially when it deviates from your phones normal activity patterns.
It would make more sense to leave your phone on and at home. However, you can’t use any of the tools the articles lists if you have no phone.
