> https://en.wikipedia.org/wiki/MSISDN https://en.wikipedia.org/wiki/MSISDN I'm reading that article as the SIM only has an IMSI, and the MSISDN routing is all

> https://en.wikipedia.org/wiki/MSISDN https://en.wikipedia.org/wiki/MSISDN I'm reading that article as the SIM only has an IMSI, and the MSISDN routing is all on the provider end, the SIM doesn't know or care. This has also been my experience when traveling and using local SIM cards. My phone has a space to show your own phone number, and a rare few SIM cards have this pre-filled out but usually you have to enter your own phone number yourself, the phone doesn't know.