Category: Media
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
Carrier Cooperation: What Your Phone Company Actually Shares
Your phone company knows an extraordinary amount about you, and a lot of people assume it keeps that to itself. It doesn’t, exactly. Carriers operate inside a legal framework that obligates them to retain certain data and to hand it over under the right kind of request, and they’re built from the ground up to
Why Your VPN Isn’t Hiding Your IMEI
A VPN is one of the most useful privacy tools you can run, and one of the most misunderstood. People install one and assume the phone is now anonymous. It isn’t. A VPN protects exactly one part of how your phone gives you away, and the hardware identifier your carrier cares about most is completely
Silent SMS: The Location Pings You Never See
There’s a kind of text message your phone can receive, process, and respond to without ever showing you a thing. No notification, no entry in your messages, no sound. It’s called a silent SMS, and it exists to find out whether a phone is on and, with the network’s help, roughly where it is. It’s
Ultrasonic Tracking: The Vector Nobody Mentions
Most tracking you can at least reason about: radios that broadcast, identifiers that get logged. Ultrasonic tracking is stranger, because it uses sound your ears can’t hear to link your devices and follow your behavior across the physical and digital worlds. It’s the kind of thing that sounds like paranoia until you understand the mechanism,
How to Vet a Secure Messenger
Picking a messaging app is one of the most consequential privacy decisions most people make, and the market is full of apps claiming to be secure. Some are. Many use the word loosely, and a few are actively misleading. You don’t need to be a cryptographer to tell them apart. A handful of specific questions,
Metadata: What Your Phone Leaks Even When Your Messages Are Encrypted
Encryption hides what you say. It doesn’t hide that you said it, to whom, when, or from where. Here’s why metadata is often more revealing than content.
Face Unlock or Passcode: Which Actually Protects Your Phone?
Face and fingerprint unlock are convenient. A passcode is stronger where it counts. Here’s the honest trade-off, including the part most people miss.
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