Mobile Phone IMEI Numbers: What are they and how do they work? - Gresham College maths lecture
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YouTubeGresham College
Mobile Phone IMEI Numbers: What are they and how do they work? - Gresham College maths lecture
Every mobile phone has a unique reference number to ensure that it's not stolen. But what are these IMEI numbers and how do they work? In this extract from his lecture on Codebreaking in Everyday Life, John D. Barrow, Gresham Professor of Geometry and Professor of Mathematical Science at the University of Cambridge, explains the maths behind ...
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