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To set the default card for data connection:
1. Open Settings and touch Network and Internet > Mobile
network.
2. Select the card which you want to set as the default one for
data connection.
3. Switch on Mobile data.
To allow the non-data SIM card to use mobile data during
calls:
When two nano-SIM cards are installed, you can allow the
non-data SIM card to temporarily use mobile data.
1. Open Settings and touch Network and Internet > Mobile
network.
2. Select the non-data SIM card.
3. Switch on Data during calls.
Control Mobile Data Use
1. Open Settings and touch Network and Internet > Mobile
network.
2. Select a card if two nano-SIM cards are installed.
3. Touch the Mobile data switch to enable or disable mobile
data use.
Select Preferred Network Type
1. Open Settings and touch Network and Internet > Mobile
network.
2. Select a card if two nano-SIM cards are installed.