The OnePlus Open, with model number CPH2551, is the first foldable phone from OnePlus. It was released in the market on October 26, 2023. The phone runs on OxygenOS 14, based on the Android operating system. This model was specifically designed for the United States market. It features two displays: a 7.82-inch foldable screen (2K 120Hz) and a 6.31-inch external screen (2K 120Hz). It is powered by a Snapdragon 8 Gen 2 processor with 16GB of RAM and 512GB of internal storage. It has a triple rear camera system: 48MP (main), 64MP (telephoto), and 48MP (ultra-wide). Additional features include: Support for 5G networks. A 4805 mAh battery that supports 67W fast charging.