Simket Faraday Bags for Phones and Car Key 2 Pack, Signal Blocking Pouch, Cell Phone Signal Jammer, Car Key/WiFi/RFID/GPS Signal Blocker Black (m)

This fits my S21 and S22 with a case no problems (not in the same bag). Put phone in bag, gave it a call, went to voicemail immediately. Very impressed. The outside is a gummy rubber texture (I assume for waterproofing) , but the inside is slick and a nice fine mesh fabric. The Velcro roll worked great and so far no issues.

Very nice Faradayt bags the will hold an iPhone max with an Otterbox (although snug). Most phones are easy fix. I put a phone and car fob in side and car could not recognize key, and "find my devices" could not be found our pinged.The bags velcro seem wrong, until I figured it had to be rolled/folder twice to give a good seal. it seems very water resistant and maybe waterproof.If you were to loose or misplace this with a phone inside, good luck finding it!

These bags work great. They are slim and fit an iPhone pro max with a case on with no issues. Velcro closure works fine and we tested the bags and they effectively block all signals and data to and from the phone.

These bags do the trick of blocking RF signals from electronic devices. The most common use of this is for blocking a phone from getting signal (cell data, wifi, bluetooth, etc), but it will also work on just about anything else that will fit inside. I'm not a huge fan of the closure style, but it works well and is easy to manipulate even for people with limited hand strength. For the price, it's pretty hard to beat.

When I first received these, I put one to the only test I knew how to do. Once sealing my phone inside, I called my number from another phone, and it didn't ring. That says something about security (but how much I don't really know).The case fits my fairly large phone nicely and is made from what appears to be a strong (siliconized?) fiber material with a velcro seal. If an EMP is ever detonated, I hope my phone is inside this (which the other test I can't perform).

Have seen so many great reviews and bad reviews of Faraday Bags that I really didn’t know what to expect. First thing I did was put my phone inside the bag folded over attached it to the Velcro tried to call my phone and it rang. I took the phone out of the bag turned on Bluetooth hotspot to my iPad put it back in the bag and guess what my iPhone connected to the phones Bluetooth. So what good are they? Doesn’t Amazon ever test? Anything that they sell? They just sell a product hope that you don’t test it and then they keep your money unless you go through the process like I have to of driving 20 miles to the nearest drop off point so I don’t have to pay Amazon to pick it up. Sick and tired of buying your garbage. Test the products you sell or don’t sell them at all.

Works amazing was on the phone with my best friend and called failed with in 10-20 seconds.

These bags stop radio waves, so your phone disappears off the global grid. Even when you turn off your phone it usually is not all the way off, and continues to contact the network from time to time. In the past one could take out the battery, but modern phones do not offer that freedom. If you would like for your phone to be quiet, and not to be tracked these are the containers for it.Some people think it is a good idea to be off the grid from time to time just so there is not an expectation that you are always available. Some folks are worried about spyware that continues to contact the network even when you think you turned off the phone. Some journalists and politically active folks worry about this. In any event, these bags are "Faraday cages" and trap electromagnetic energy. Obviously you cannot receive or make calls when the phones are inside. Nor can you get texts nor have it search for WiFi. Low cost and effective, and much better than aluminum foil.(I do not know if aluminum foil hats stop brain waves, but that is another topic. ;-)