iOS - Dual-Sim with SCA

Third-party apps like the SCA can’t actively control which SIM card is used for outgoing calls. SCA tells the operating system to dial a number. iOS then decides which SIM to use based on device settings —in this case it would be the default line for outgoing calls. Usually, the business SIM is set as the default.

The only way to influence this is:

• When creating a private contact, manually set the preferred SIM.

• Or, during the first call to a new contact, choose the desired SIM (e.g. “Private”) in the pop-up.

The iOS typically remembers this choice and uses it for future calls to that contact.

We recommend, the following:

• The business SIM should be set as the default for outgoing calls in device settings.

• All private contacts should be saved with the private SIM assigned for outgoing calls.

How to set Default Voice Line:

• Go to Settings

• Go to Mobile Service

• You can set your Default Voice Line to Business or Primary.

Underneath, both SIM lines (Primary and Business) are visible with their numbers. This setting defines which SIM line will be used first by default when you dial a number.

How to assign Prefered Line for Contacts:

• Open the contact you want to change Preferred line.

• Tap the area between the profile picture and the name to edit the line setting.

• You can set the Preferred Line to Last Used, or choose to always use Business or Primary.