Automatic SIM selection is one of the cool features available in the dual SIM card models of Moto G (android device). The feature is called Automatic SIM selection and is valid when the user has selected the option Ask every time I make a call in the settings.

What is automatic SIM selection in Android Device (Moto G) ?

Automatic SIM selection is a feature that helps the users to select a SIM card automatically when using DUAL sim. The beauty of this feature is that , the phone will learn from the SIM card usage and then suggest or pick the SIM card automatically.

This option can be enabled in the Call Settings of the Settings App on your device.