The video recording of my OsmoDevCon 2024 talk GlobalPlatform in USIM and eUICC has just been released.
The talk covers GlobalPlatform basics as they are relevant in the context of SIM cards (UICCs) and eSIM/eUICCs. It introduces the concepts of Applications, Security Domains, Secure Channel Protocols, etc.
I’ve also added it to the list of SIM technology related videos at Wiki - pySim - Open Source Mobile Communications