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Mobile phone still operate while wrapped in your fabric, How can make sure it works?

posted Oct 8, 2018, 2:30 AM by Amir Borenstein, No Rad   [ updated Oct 8, 2018, 2:34 AM ]
Q - I have rated my mobile phone with you fabric and I can still call it.
Does that mean that your fabric is not working?

A. - No , it does not mean the fabric is not working but it may mean at least on the the following:
1. You left some gap opened, and some "reception" (radiation from the cell tower) gets inside and allow the phone to receive calls.
2. The level of reception in the place you did the experiment is high, the fabric can block about 98% of it. The raming 2% can still allow the phone to receive calls, then the phone transmit much stronger signal to get to the nearest antenna.
In some conditions, If done correctly and in a low reception area, when you wrap the phone, it should not get any calls and will not be able to connect the network.
As shown in the video bellow (in Hebrew but you can see the effect) the phone lose the network (playing radio via application over the cellular network) when entered inside a RF Protective case made out of the S240 fabric. - https://youtu.be/8ZKZDmdK7-4

Press the "CC" for english subtitles

The right way to test

The right way to test RF Protection is to have a clean room (with no RF inside). Then put an RF source in it, like a dect phone of a WIFI router. Put the RF meter against the phone or router and measure the RF radiation. Now put the RF Blocking material (it should be at least 4 times bigger than the source and it's antenna) 
This is how it looks when tested against a corded phone - https://youtu.be/oEbJKBab9p8

RF Blocking Fabric S240