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Yes, you can receive phone calls on your primary number if your device supports having both a physical SIM and eSIM active simultaneously. This is made possible by Dual SIM Dual Standby (DSDS) technology, which is available on many modern devices.
If you are using an iPhone, certain models allow you to connect both your physical SIM (primary number) and Gigago eSIM at the same time. This means you can use the Gigago eSIM for mobile data while still receiving calls and texts on your primary number through your physical SIM.