What’s this dual SIM thing in the new iPhones?

SIM cards

You can use two mobile plans with your iPhone Xs (or iPhone Xs Max), a nano-SIM and an eSIM. An eSIM is a digital SIM that allows you to activate a mobile plan from your carrier without a physical SIM.

The functionality will not be available at launch and will be released in a subsequent update to iOS 12. Unfortunately no carriers in Australia currently support eSIMs but the big three are all in discussions with Apple.

What can you do with the two SIMs?

  • Two numbers – One for business and another for personal calls.
  • Add a local data plan when you travel outside of the country.
  • Have separate voice and data plans.

You are able to label each line as you want to easily identify them.

What options are available in setup?

Use Primary as your default line: If you select this option, Primary will be used by default for voice, SMS, Data, iMessage, and FaceTime. Secondary will be available just for voice and SMS.

Use Secondary as your default line: If you select this option, Secondary will be used for voice, SMS, Data, iMessage, and FaceTime. Primary will be available just for voice and SMS.

Use Secondary for cellular data only: You might want to select this option if you’re traveling internationally and you want to keep Primary for voice, SMS, iMessage, and FaceTime. This will allow you to use Secondary for data.