Your device is equipped with dual SIM capability, but sometimes you may prefer to have only one SIM active while keeping the other in offline mode to avoid disturbances.
To manage SIM cards on your Asus Zenfone 3 ZE520KL, follow these steps:
Step 1: Navigate to 'Settings'.

Access 'Settings'
Step 2: Select 'Dual SIM card settings'.

Choose 'Dual SIM card settings'
Step 3: Select the SIM card you wish to deactivate.

Select the SIM card to deactivate
Step 4: Currently turning off the SIM card.

Currently turning off the SIM card
Step 5: Choose to reactivate the SIM card.

Choose to reactivate the SIM card
Wishing you all success.
