Sure, here is a description and the specifications of the Samsung Galaxy Note 20 Ultra 256GB Built-in, 8GB RAM, UFS 3.1 Smartphone:

Display:

• 6.9-inch Dynamic AMOLED 2X display with a 120Hz refresh rate
• 3088 x 1440 resolution
• HDR10+ support

Processor:

• Samsung Exynos 990 processor

RAM:

• 8GB RAM

Storage:

• 256GB UFS 3.1 storage

Rear Camera:

• 108MP main sensor with an f/1.8 aperture
• 12MP ultrawide sensor with an f/2.2 aperture
• 12MP telephoto sensor with an f/3.0 aperture and 5x optical zoom
• Laser autofocus

Front Camera:

• 10MP sensor with an f/2.2 aperture

Battery:

• 4500mAh battery
• 45W fast charging
• 15W wireless charging

Other Features:

• S Pen stylus support
• IP68 water and dust resistance
• Ultrasonic fingerprint sensor
• Color: Mystic Black, Mystic Bronze, Mystic White

Price:

• Starting at $999

Disclaimer: This is a general description of the Samsung Galaxy Note 20 Ultra 256GB. Specifications may vary depending on the region and model.