~
I am still looking for a DIY tutorial for some portable Faraday cage. I have some boxes at home made out of metal but they don't help much: phone still rings after I close the box and is still connected to Wi-Fi. AFAIK, as soon as you put an AM radio inside the box and it stops receiving signal, it means you've got a successful cage.
Anti-RFID pouches/cases I've seen are too expensive. Tinfoil should do the job but there must be something I'm doing wrong as signals are leaked. I made a DIY phone case with some tinfoil and if I put my phone inside the case and then put the case inside a metal box, it disconnects from everything: bluetooth, Wi-Fi, radio, cell signal.
You know these older phones with physical keyboards? If you have one of these, take it and use it for calls and messaging. If you want to stop the tracking, just take the battery out and there you go. You could have two phones:
- Phone A, old model (say an old Nokia) strictly for communicating through SMS & calling;
- Phone B, smartphone with modified hardware (no mics, no GPS antennae, no cameras, no fingerprint etc) for Internet browsing. If you go for a combination of Graphene OS, Replicant or Lineage OS (without GApps, of course) with Orbot and Tor browsing and never connect to any of your personal accounts, you should be good.
If the old phone you're using for communication has a 3.5mm jack slot and you're worried you may be listened to through the phone's mic, you could take the mic off and only call using headphones or handsfree. May be more inconvenient but it eliminates this risk too.
For accounts, Parrot OS Live with Anonsurf on or Tails is the best choice. When I need to log in to Twitter for example (I use an account that has no link to my identity), I use Tails but I make sure I do not access any other of my accounts unless I reboot. Be under control of the tracking. Take your privacy back, I never consider a step towards my privacy to be "too much". It's never too much imo.