Dual SIM functionality allows two cellular plans on one iPhone. Compatible with certain models, users must purchase or transfer a secondary plan. After activation, setup in settings includes labeling lines and choosing defaults for various services. Only two lines can be active simultaneously. Instructions include selecting default lines for calls, texts, iMessage, and FaceTime, and managing cellular data usage. Signal strength indicators differentiate between lines. Users can assign lines to contacts for default communication. Changing lines mid-call is also explained. Subscribe to Apple Support for further assistance.
Summary:
– Dual SIM enables two cellular plans on one iPhone.
– Compatible with specific iPhone models.
– Setup involves labeling lines and choosing defaults.
– Only two lines can be active simultaneously.
– Users can assign lines to contacts and change lines mid-call.