Using Wireshark to sniff communication between your computer and Smart Card / SIM Card
Sending commands/APDUs to a real life Smart Card.
A look at APDUs and Interacting with Cards
The basics of Smart Cards & their File System
Getting up close and personal with Smart Card / SIM Cards
Acronyms and cryptography – a look at Subscriber Identifiers in 5G
What do Unlock SIMs sold online actually do and how do they do it?