Asus ZenFone Max Pro ZB601KL User Manual page 36

Assigning a preferred SIM card
Assign a SIM card as your preferred SIM for voice calls, SMS messages, and data services.
SIM card for calls
When you make a call, your ASUS Phone automatically uses the preferred SIM card to connect the
call.
To assign a SIM card for voice calls, tap Calls then tap the SIM that you want to use.
IMPORTANT! You can only use this feature if you make a call from your contacts list.
SIM card for SMS messages
To assign a SIM card for SMS messages, tap SMS messages then select from SIM 1 or SIM 2.
SIM card for Cellular data
To assign a SIM card for data service, tap Cellular data then select from SIM 1 or SIM 2.
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Chapter 4: Keeping in touch