There's nothing you can do to prevent a SIM-swap attack


Photo of a nano SIM card and its plastic housing.

It is tempting to think that users are to blame for their own misfortune. If only they'd had a stronger password! If only they didn't re-use credentials! If only they had perfect OpSec! If only...! Yes, users should probably take better care of their digital credentials and bury them in a digital vault. But there […]

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Cheapest Possible eSIM in the UK


Photo of a nano SIM card and its plastic housing.

After railing against eSIM-only phones for over a decade, I've finally succumbed. It appears impossible to buy a modern phone without them. Thankfully, most seem to be dual-SIM. So I can have a regular SIM card and an eSIM. I find dual-SIM phones handy. I have a disposable number which I give out to people […]

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Using disposable phone numbers for better security


A pair of SIM cards.

Last night I received a call from my bank. They'd detected an unusual transaction and wanted to make sure that it was legitimate. Had I recently purchased £10,000 worth of crypto in the Maldives? What?!!? No! ARGH! I started to panic. All my apes money gone! No. Wait. The other thing. I knew it was […]

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Best Bulk Data PAYG SIMs in the UK


The Doctor on the phone.

I want to buy a big chunk of data and use it until it runs out. I'm not interested in a contract. I don't want a bundle of phone calls, SMS, or ringtones. Just give me DATA that lasts for as long as possible. Here's the best data deals that I could find. Stick them […]

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You need a SIM card in your phone to dial 999


Photo of a nano SIM card and its plastic housing.

I want to correct a common misconception. Many people think that you can dial the emergency services even if you do not have a SIM in your phone. I see this advice scattered around the web - often telling people to keep an old, SIMless phone for an emergency - and it is dangerously wrong. […]

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The SIM-less Phone Is Coming. And It Should Scare The Shit Out Of You


Photo of a nano SIM card and its plastic housing.

The argument over the nano-SIM is a distraction. It's a sleight of hand designed to catch the industry off guard and fool it into doing something really stupid. The SIM is designed to do a number of things; encryption, address storage, hold SMS, etc. Most importantly, it's designed to be swappable. With GSM, you can […]

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