[Phone] How to assign a preferred SIM card for data service network?
* This knowledge only applies to the models with dual sim card slots.
1. Assign a SIM card for data service network
Select your preferred SIM card in Settings > Network & internet > SIM Card > Data service network > Set your preferred SIM card .
2. Enable cellular data
If you would like to use the cellular data of SIM card, you can enable the function in Settings > Network & internet > Internet > Select your preferred SIM card >Enable Mobile data.