Sim card
When you’re in another country, buy & insert a sim card… then at one point it asks whether you want to use the primary or other account(I can’t remember with the other choice was)…. Is the sim card then the “primary”?
iPhone 13
Question marked as
The best way to confirm which SIM (Phone Number) is Primary and which is Secondary (or whatever name you gave it) is to Open Settings ➡️ Cellular ➡️ Look under SIMs: Here you will see your active SIMs (Phone numbers). On this page, you can also select which SIM should be used for data and which SIM should be used for Voice. You can use one SIM for both Voice and Data as well. You can even turn the other SIM completely OFF if you want.
Axel F.