Cell Phone Anti-tracking Anti-spying GPS RFID Signal Blocker Faraday Cage Bag (Cell Phone Blocker)

I am writing a review now, with a follow up based off more extensive testing. I tried my cell phone with using only the small bag by itself. The signal dropped but not enough. I placed the small bag inside the larger bag, and with the help of a friend, received no calls at all. I emailed myself several times from a computer, nothing at all. I removed the cell from both bags and within a minute i was flooded with emails. The person who had tried calling stated she got my voicemail. It appears that both bags are made of a mesh steel or metal, and appear to be a heavy duty material. I will be back with further results. I estimate this will turn into 5 stars

Unable to properly know if it actually works I don't have the authority to track cell sites. I hope it works in drivers license with chips . I don't know if they track but I will use it for both anyway

I'm very happy with the product. I tested it and the cell signal was blocked immediately. I just got it today.

They really work. They give you two bags. One fits inside the other to give you more protection. In my case one seemed sufficient.

Bought it recently and tested. Great product - it killed the signal but not the battery just like it said.

Wasn't what I thought it was when I order it, I shipped it back yesterday

The blocker came in a yellow envelope so was hard to miss. It completely eliminated all signal - WiFi and cell phone reception were gone.I don't need anyone tracking me (why they would, I don't know, but they do anyway), but this work-so far, anyway. We'll see how it goes - there are lots of cell phone towers around me.The one thing I would say is that the blocker is pretty big; I guess they make it to fit bigger phones,but it would be nice if it fit my iPhone 4S better.