Instructables

What happens to my phone in an RFID blocking wallet?


Greetings!

I'm curious about everyone's experience with using RIFD blocking fabric for blocking phone transmissions.  If I put my phone in a pocket like this, will my phone struggle even harder to find a signal and run my battery down quickly? What other concerns come into play with using this to block signals to digital devices? 

I plan to experiment with different fabrics from lessemf.com if anyone has some recommendations or warnings.  

Thanks!


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Picture of What happens to my phone in an RFID blocking wallet?
Kiteman5 months ago

Hey, Sarah, have you made any further progress on this?

Kiteman6 months ago

If you put your phone in aircraft mode, battery life should be OK.

scoochmaroo (author)  Kiteman6 months ago

Yeah, I'm wondering more about what happens if I don't put it in airplane mode first. If I just had a pocket and slipped my phone in when I didn't want to be bothered. Imagine I'm someone who doesn't understand airplane mode. Or phones ;)

i like the "sounds off" feature. an incoming call still shows up on caller id, but does not disturb the peace.

Like caitlinsdad says, your battery will run down massively, as the phone panics and starts shouting for phone masts.

Having said that, RFID cards and mobile phones work on different technologies and radio frequencies - a pocket that blocks RFID data transfer *may* not block mobile phones. The best thing to do is to put your phone inside the RFID blocking pocket on purpose, and try to ring it. If you can get through, you should have no battery issues.

On my regular phone with Verizon, if I am in an old house for most of the day, the metal lath in the plaster walls interfere with the reception. I will run down 3/4 of the battery which normally lasts for 2 to 3 days in standby. Kinda the same thing being stuck in a subway tunnel. Of course, getting missed messages and texts caught up is dependent on your service provider and how your phone reacts. Phones will try to use more power to find a signal or do its connection pings for service.

Toga_Dan5 months ago

when i first got a cell phone, i experimented with blocking signal. placing it in a metal pan with a tight fitting lid, it would still ring. i'm not sure if theres a difference in putting it in metal screen or cloth.

thematthatter6 months ago

wrap your phone in foil and see how long the battery lasts.

you mean put the phone in my hat?

"They" will find out anyways, especially when you use windows XP.

dang, how did you know?

*boots to Windows Me*

HOPY6 months ago



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caitlinsdad6 months ago

You can catch the replay of Wearable Wednesdays with Becky Stern. She demonstrates and talks about fabric shielding pockets for your electronics.

http://www.adafruit.com/blog/2014/05/28/wearable-e...

And welcome back, things around here aren't the same without a few or your ibles.