Samsung Z4 User Manual page 20

Basics
Using dual SIM or USIM cards (dual SIM models)
If you insert two SIM or USIM cards, you can have two phone numbers or service providers for
a single device.
Activating SIM or USIM cards
On the Home screen, drag the favourite apps panel upwards and tap Settings → SIM card
manager. Select a SIM or USIM card and tap the Use SIM card switch to activate it.
Changing the display icon and name of SIM or USIM cards
On the Home screen, drag the favourite apps panel upwards and tap Settings → SIM card
manager. Select a SIM or USIM card and tap Icon or Name. Set a display icon and name for
each card.
You cannot change the default names of the cards. To change the display name for a
SIM or USIM card, you must first change the display icon.
Setting preferred SIM or USIM cards
When two cards are activated, you can assign voice calls, messaging, and data services to
specific cards. On the Home screen, drag the favourite apps panel upwards, tap Settings →
SIM card manager, and then set the feature preferences for your cards in Preferred SIM card.
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