- Large protests are expected across the U.S. on Saturday to express voice discontent with President Trump’s administration.
- Organizers aim to make the protests accessible by holding events in many places, including small towns.
- The protests reflect growing momentum and dissatisfaction with Trump’s policies on immigration, transgender rights, and the firing of federal workers.
100% unrelated, Anyone know if Faraday bag for phone is a good option for large gatherings where i uhh… just want to be part of the moment?
If you don’t want to be tracked down afterwards based on your phone’s location, turning it off will suffice.
If you fear to get arrested, you should just leave it at home or somewhere it cannot be found too easily.
You need the phone turned off, and the offline Bluetooth most phones these days broadcast also disabled. The NFC could also passively respond, although that would require more clever engineering to make a directional NFC scanner. ISO 15693 apparently extends the NFC distance to 3 feet.
If you really can’t bear to be without a phone, get 2 burners. Put the number of each on the other. Nothing else. Bring one, and give the other to the person who might need you urgently or might be able to bail you out. You can write their burner number on yourself for EMTs to call, without giving police any justification for getting into their real phone.
I’ve tested some and they work good if properly wrapped shut, but probably better for day-to-day use and less for such an event where you’d probably be best just to leave it home. Phones use radio frequencies from 14MHz (NFC) to 39GHz (5G mmWave) with spec up to 71GHz. It is real hard to get a radio wave blocker bag that can block almost every conceivable frequency band in the RF spectrum.
It is also hard to truly turn phones off anymore, many broadcast Bluetooth beacons when powered off, and even outside of that, they leave dead-reckoning tracking turned on that can extrapolate where you may have gone just by how you walk. It is also why a phone turned off can still have a dead battery in a month or two, because stuff is kept running, when older phones truly turned off and you could pick it up a year later and still have a charge.
EE here - a well sealed foil pouch should work just fine for basically all RF radiation. Even at a few MHz a piece of heavy duty aluminum foil has like 150dB of attenuation, and that goes up to basically infinity above 1GHz.
Came to say this. Tinfoil wrapping should work to keep your phone isolated.
So. I have had some recent experiences that have been… Very educational about a lot of the less thought aspects of technology that most people take for granted. H Most faraday bags you can buy are fucking garbage. None of them hurt in the grand scheme of things but they more involved this but I can’t do calculus so feel free to do the math). At around the 5 and 6 ghz range (guess what frequency wifi 6 and 5g operate at?) the gap size in a faraday cage needs to be something like 1-2mm.
Of course you’re not talking about a farDy cage, but a shielded bag. So buy one, close it with the Velcro clasp, and ask yourself: how snug is sealed Velcro? How much can I roll this up? And all the other myrad questions that lead to the same fucking conclusion: this is not the radio blocking solution you thought it was.
This isn’t to say you can’t buy a faraday bag that works (even if it does you may need more than one) it’s that as the frequency it gets increasingly difficult to block the signals coming in and out.
And I don’t understand the math, at all, but I’m not sure how the power of a signal would effect a faraday bag. Like.im assuming it would but.
Anyway…my point is: if you’re bringing a faraday make very, very, very,VERY fucking sure it actually works.
How do you do that? I’m not 100% be t I’m pretty sure the equipment needed is complicated and expwnaive.
Someone more knowledgeable can expand on any of this, . Since everything I’ve learned on the subject has been severely limited by the fact that the Internet is a fucking wasteland.
