Apple® iPhone® - Dual SIM with an eSIM - Change Default Cellular Data Number

Note Notes:

  • The steps below apply to the iPhone XS / XS Max and newer models.
  • Only one mobile number can use cellular data at a time.


  1. From a Home screen, navigate: Settings Settings > Cellular.
  2. Tap Cellular Data.
    Note This option is only available when both the physical SIM card and eSIM are activated.
  3. Tap the number you'd like to use cellular data.
    Note If desired, turn Cellular Data Switching on Switch On icon to allow your phone to automatically switch the Cellular Data number while on a call.
    Select Cellular Data Line


Note For additional info, check out this Apple article.