It seems there might be a misunderstanding here.
**Apple has not yet released a foldable iPhone.**
Therefore, an Apple foldable iPhone cannot have “sold out” or been “a hit” with consumers at this time, as it’s not available for purchase.
The “Duo” naming convention and the idea of a foldable phone at a premium price point (around $2,000) are more commonly associated with **Microsoft’s foldable phone, the Surface Duo.**
While there have been numerous rumors and patent filings suggesting Apple is exploring foldable technology, an official product has not been announced or launched. Any reports of an Apple “foldable iPhone Duo” selling out are currently inaccurate.
If Apple *were* to release a foldable iPhone and it immediately sold out, that would indeed indicate very high demand and be a significant development in the smartphone market, but that event has not yet occurred.
