Vivo X90 5G (12/256GB) smartphone, as it might have been released after that date. However, I can provide a general template for a smartphone description, and you may check the latest sources for specific details:

The Vivo X90 5G (12/256GB) smartphone likely features:

1. 5G Connectivity: Enjoy high-speed internet and improved network capabilities.
2. Storage Capacity: Ample storage space with 256GB internal storage for your apps, photos, and media files.
3. RAM: Smooth multitasking and app performance with 12GB RAM.
4. Display: Expect a vibrant and immersive display for an enhanced visual experience.
5. Processor: A powerful processor for efficient performance and smooth user experience.
6. Camera System: Advanced camera setup for high-quality photos and videos.
7. Operating System: Runs on the latest version of the Android operating system, with potential customization from Vivo's interface.
8. Battery Life: Long-lasting battery to keep you connected throughout the day.
9. Design: Sleek and modern design with premium materials.
10. Additional Features: Fingerprint sensor, facial recognition, fast charging, and other features that enhance user experience.