Samsung SM-A146U1/DS User Manual page 16

Basics
SIM card manager (dual SIM models)
Launch the Settings app and tap Connections → SIM card manager.
• SIM cards: Activate the SIM card to use and customise the SIM card settings.
• Preferred SIM card: Select to use specific SIM cards for some features, such as voice calls,
when two cards are activated.
• More SIM card settings: Customise the call settings.
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