iPhone Duo preorders open: Apple's first foldable starts at $1,999

Apple has opened preorders for the iPhone Duo, its first folding phone, unveiled at the September event. Pricing starts at $1,999 and tops $3,000 with 2TB of storage, with two colors and four storage options. Orders ship starting October 23, and supplies are expected to be limited.

• Pricing starts at $1,999, over $3,000 for the 2TB model
• Two colors, Star White and Night Sky, four storage tiers
• Orders begin shipping on October 23
• AT&T and T-Mobile trade-in deals cut up to $1,200 and $1,000