Security Explorations - SIM / USIM cards

https://security-explorations.com/sim-usim-cards.html

"On this web page, we are to share some information based on the experiences gained in the SIM / USIM card security space, all in a hope this leads to the increase of public awareness on the topic, change perspective on the SIM / USIM card industry and potentially trigger some positive changes (such as introduce transparency in vulnerability handling processes in particular)."