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Can you trust your phone? Head to to start your free 30-day trial and get 20% off an annual premium subscription.

A huge thank you to Linus Sebastian and the team at Linus Tech Tips - check them out at @LinusTechTips

A massive thank you to Alexandre De Oliveira and Karsten Nohl (aka @hackingmatters) for making this demo possible. Karsten has made a great follow-up video on the subject, which you can watch here:

A special thanks to Crofton Black at Lighthouse Reports, Cathal Mc Daid at Enea, and James Hobson at @hacksmith

00:00 I hacked Linus!
00:59 How Steve Jobs and Steve Wozniak hacked the telephone network
02:22 Early history of the telephone
07:08 The kidnapping of Sheikha Latifa
08:41 How Signalling System No. 7 works
11:03 Why SS7 is vulnerable to hacking
12:15 How hackers gain access to phones
16:17 How I was able to spy on Linus’ phone
18:09 How hackers can intercept text messages
21:04 How your location can be tracked via SS7
29:03 How to protect your phone from hacking

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If you’re looking for a molecular modeling kit, try Snatoms, a kit I invented where the atoms snap together magnetically -

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References:
Black, C. (2020). Spy companies using Channel Islands to track phones around the world. The Bureau of Investigative Journalism -
It is dangerously easy to hack the world’s phones via The Economist -
Blake, H. (2023). The Fugitive Princesses of Dubai. The New Yorker -
McDaid, C. (2021). How Surveillance Companies Track You Using Mobile Networks. media.ccc.de -
Engel, T. (2014). SS7: Locate. Track. Manipulate. media.ccc.de -
Nohl, K. (2014). Mobile self-defense. media.ccc.de -
How Cell Service Actually Works via WendoverProductions -
How Telephone Phreaking Worked via The 8-Bit Guy -
Transmission Lines: Part 1 An Introduction via TheSiGuy -
The Step-By-Step Switch via AT&T Tech Channel -
Hacking Your Phone via 60 Minutes -
Rosenbaum, R. (1971). Secrets of the Little Blue Box. The Esquire Magazine -
Black, C. et. al. (2023). Ghost in the network. Lighthouse Reports -
Kerr, D. (2019). The step-by-step telephone switching system. dougkerr.net -
Ecall and 2G/3G Network Obsolescence via PFA Plateforme Automobile -


Images & Video:
All references can be found here:

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Directed by Henry van Dyck
Written by Henry van Dyck
Edited by Laura Mills
Animated by Fabio Albertelli, Ivy Tello, David Szakaly, and Jakub Misiek
Filmed by Derek Muller and Linus Media Group Team
Additional research by Gabe Bean
Produced by Derek Muller, Henry van Dyck, Rob Beasley Spence, Tori Brittain, Emily Lazard, Luke Lewis, Gregor Čavlović, and Emily Zhang
Thumbnail contributions by Ren Hurley and Peter Sheppard

Additional video/photos supplied by Getty Images and Storyblocks
Music from Epidemic Sound

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