The moment tech fans have been waiting for is finally here, as Apple officially unveils the iPhone Duo. Apple is giving a new twist to its flagship smartphone line: The company unveiled the iPhone Duo, its first foldable smartphone. Key points and original sources are listed below.

• The moment tech fans have been waiting for is finally here, as Apple officially unveils the iPhone Duo.S1

• Apple is giving a new twist to its flagship smartphone line: The company unveiled the iPhone Duo, its first foldable smartphone. The company’s iPhone Duo foldable has an internal dual-display panel that provides the largest, most immersive screen size ever at...S2