Category: Use Cases
Locking Down Smartphones for Kids
Here’s how to lock down a smartphone for kids.
How to Use Smartphones in a Simulated Exercise
Standing up TAK for a two-hour exercise is not worth the squeeze. Here is how to run the whole thing on phones instead.
eSIM vs Physical SIM: The Privacy Trade-offs Nobody Explains
The SIM card is quietly disappearing. New phones increasingly ship with an eSIM, a SIM built into the device that you activate by software instead of a chip you slot in. Carriers love it, manufacturers love it, and the convenience is real. The privacy story is more mixed than the marketing suggests, and the trade-offs
IMSI Catchers in 2025: What Works and What’s Snake Oil
IMSI catchers are real, they’re used, and the surveillance they enable is not paranoia. That’s exactly why the topic attracts so much junk. Around a genuine threat has grown a market of detector apps and anti-surveillance gadgets that mostly don’t do what they claim. Here’s how to tell the real mitigations from the snake oil.
Why Calls and SMS Aren’t Private: SS7, Explained
Most people assume that a phone call and a text message are reasonably private, protected by the phone company if nothing else. They’re not, and the reason is a piece of plumbing from the 1970s called SS7. Understanding it explains why security professionals treat ordinary calls and texts as open channels, and why your bank’s
Building a Faraday Setup That Actually Works
A Faraday bag is the closest thing to a real off switch for a phone’s radios. Wrap a device in the right material and seal it properly, and nothing gets in or out: no cellular, no Wi-Fi, no Bluetooth, no GPS reception. That’s the appeal. The problem is that a lot of homemade Faraday setups,
Secure Phone Maintenance: What Not to Do
Most advice about a secure phone tells you what to set up. Less of it tells you how to avoid quietly dismantling that setup over the following months. A hardened phone isn’t a one-time achievement, it’s a state you can erode one convenient decision at a time. Here are the habits that undo the protection
The $500 Mobile Security Lab
The best way to understand mobile security is to see it with your own eyes, and you don’t need a corporate budget to do that. For a few hundred dollars, you can assemble a modest home lab that lets you observe how phones actually behave, what they leak, and how hardening changes things. The point
Buying a Phone Privately, Legally
There’s a legitimate, legal version of buying a phone with less of a data trail, and there’s an illegal version that involves fraud and fake identities. This is about the first one. You can reduce how much unnecessary personal information gets attached to a new device and its service without breaking any laws, and for
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