How Xiaomi, Oppo And Other Non-US Brands Are Challenging The iPhone Duo

The foldable phone market heats up as new competitors emerge.

Benjamin Fanjoy/Getty Images

While Apple is already selling the iPhone 18 Pro, the world is waiting for the iPhone Duo — the first foldable iPhone. It won't hit stores until October 23, with pre-orders beginning a week earlier.

But Apple's competitors have had their eyes on it for quite some time. In fact, the market has been gearing up for the iPhone Duo long before Apple even officially announced it…