3
Dual-card settings
When you are using two SIM cards, the lower card slot is set as the primary
card slot by default, supporting 2G, 3G, and 4G networks, while the upper
card slot is set as the secondary card slot, supporting 2G networks.
To switch the primary and secondary card slots, touch
Settings
>
Dual card
management
, and set Card 2 as the 4G/3G card slot.
If you are using only one SIM card, the card slot you insert your SIM card
into will be set as the primary card slot.
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