Selecting a SIM card for data traffic
If you are using a Dual SIM device, you can select which SIM card handles data at any given time. You can do this during the initial setup of your device, or you can select or change it later via the Settings menu.
To change the SIM card used for data traffic
- Find and tap Settings > Network & internet > Advanced > Dual SIM > Cellular data.
- Select a SIM card.