A static archive of Markus Tacker's tweets. Follow me on Mastodon: @[email protected].
Oh boy, #GSMA standards are awesome!
Syntax of the (U)SIM Header: The issuer identifier numbers are normally used to
distinguish between multiple issuers within a country. However, these numbers
may also be used to distinguish individual countries sharing the same country
code.
Also it totally sucks that the standard is basically 89 + whatevs.
That really sucks for the project I am working on right now where I need to
identify SIM card issuers. It could have been so easy to identify the vendor
from a fixed number, but I instead I need to match 800 IDs.