1. Display: A large, high-resolution Dynamic AMOLED display, possibly with a high refresh rate for smooth visuals.
2. Storage: 256GB of internal storage for ample space to store apps, media, and files.
3. RAM: 12GB of RAM for smooth multitasking and enhanced performance.
4. Processor: A powerful and efficient processor, possibly the latest from Samsung or another leading manufacturer.
5. Camera System: An advanced and versatile camera system, possibly featuring multiple lenses with high megapixel counts, optical zoom capabilities, and advanced image processing.
6. Battery: A large battery capacity with fast charging capabilities, possibly both wired and wireless.
7. Operating System: The latest version of Android with Samsung’s One UI on top, providing a feature-rich and user-friendly interface.
8. Connectivity: Advanced connectivity features such as 5G support, Wi-Fi 6, and Bluetooth.
9. Design: A premium design with high-quality materials and a unique color like Phantom Black.
10. Security: Biometric security features like an in-display fingerprint sensor and facial recognition.
11. Additional Features: Depending on the model, additional features could include water and dust resistance (IP68), stereo speakers, and support for S Pen functionality.

For the most accurate and up-to-date information about the Samsung Galaxy S23 Ultra 12GB + 256GB Phantom Black (Dual Sim) (SM-S918BZKCMWD), I recommend checking the official Samsung website, contacting Samsung customer support, or referring to reputable retailers and online stores. They should have the latest details on the device’s specifications, features, and availability.