Use an SLNT bag
this post was submitted on 17 Aug 2025
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Privacy
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My first faraday bag was a 'HODUFY' pouch. It works fine.
After that, I bought the Nickle/Copper fabric from China and tested making pouches using cyanoacrylate glue and velcro strips. I found a supplier now that sells 10 m x 1.1 m fabric for $65 + shipping.
If you are in a hurry and you only want the cellphone pouch, you can buy a cheaper pouch online and test that you cannot call it nor connect via Bluetooth when it is inside the pouch. Working with the fabric directly lets you make custom pouches by cutting, folding, and gluing.
Here are some photos of a HODUFY and the DIY pouch. In the third photo you can see that the material inside the pouch is a similar type of Nickel/Copper fabric.
To make the pouch, a single piece is cut into a rectangle and folded in half, leaving three open sides. Two of the three open sides are folded over twice and glued shut. The remaining side is the opening, which makes use of velcro strips to close. This opening also needs to be folded when closing, like this:
The key point here is that you do not pierce the fabric, and you make sure that the edges are sealed shut properly by folding.
This is actually badass. I might try that. It the fabric fairly rugged? Why did you stop using the Hodufy?
The hodufy works for a phone. I just wanted to experiment to learn. I don't use any of them often - I keep my phone in airplane mode and without a sim card and only use it with WiFi.
So you use wifi calling?
I video call my family over WiFi, usually when I am home. For me it is easy to get by without making a phone call. In the past few years I remember making one phone call to cancel an internet subscription and one to make a doctor's appointment. Calling is not my preferred medium, I strongly prefer e-mail. I do keep a prepaid SIM card inside my phone's case in case of emergency, but fortunately I have never needed it.
Why would one want to put their phone in a faraday cage? I know what the cage does, but don't understand why you'd want to use one instead of turning the device off.
Edit: According to this, unless your phone is compromised, turning it off is sufficient.
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