When the phone uses dual SIM cards, you can modify the default SIM card to dial or access the Internet, which is convenient to control the mobile data and calls of the dual SIM cards.
Setting method:
realme UI 3.0 and above versions: Settings > Mobile Network > Mobile data > Calling / Internet > Select SIM 1/2
realme UI 2.0: Settings > SIM card & mobile data > Default SIM settings > Calling/Internet> Select SIM 1/2
realme UI 1.0: Settings > SIM card & mobile data > Default card settings > Calling/Mobile data > Select SIM 1/2
realme UI R & Go & S & T & U Edition: Settings > Network & internet > Select SIM 1/2 > Call preference/Mobile data
When the default calling card is set to SIM 2, when you dial, SIM 2 will be used to make a call.
When the default Internet card is set to SIM 2, when you use mobile network, SIM 2 's mobile data will be used.
Fast data network switching setting method:
Swipe down the status bar from the top of the screen, click the Mobile data under the data icon on the control center page, enter the mobile data switching page, and select the corresponding mobile network.
Use mobile data during calls
After turning on Use mobile data during calls, if you set the first card as the Internet card when the secondary card receives a VoLTE call, it will temporarily switch to the secondary card to access the Internet to ensure that the network is still smooth during the call and switch back to the main card when the call ends.
Note:
1. The function of using mobile data during calls needs the secondary card to be used only after VoLTE HD calling is turned on.
2. The function of using mobile data during calls requires dual SIM cards to be used.