Realme
Mobile Data During Calls on Secondary SIM auf Realme
On a Dual SIM Realme phone, only one SIM can usually carry a call at a time. Whether the other SIM keeps supplying mobile data during that call depends on a single toggle in Realme UI.
If this option is off, apps relying on the secondary SIM for data pause as soon as a call starts on the primary line. Messages stop syncing, downloads pause, and voice or video calls in other apps drop.
Turning it on lets the secondary SIM maintain a data connection while a call runs on the other SIM. This matters if one SIM is voice-only and the other carries your main data plan.
Menu path
Open Tap on Settings ➔ Tap on SIM card & mobile data ➔ Enable or disable Use Internet during calls on secondary data SIM.
Enable the option to keep the secondary SIM online during calls. Disable it if you want to limit data usage on that SIM, for example to control costs on a prepaid or roaming plan.
Network speed can still dip briefly when a call starts, since the modem is switching tasks. This is normal and not a sign the setting failed.