Samsung SM-G991U Galaxy S21 5G UW Dual SIM TD-LTE US 128GB / SM-G991P (Samsung Unbound M1)
Samsung · Announced Jan 2021
About Samsung Galaxy S21
The Samsung Galaxy S21 presents a compact yet striking form, measuring 71.2 mm wide, 151.7 mm tall and just 7.9 mm thick, while weighing in at a light 171 grams. Its front is dominated by a 6.24‑inch AM‑OLED panel that delivers a crisp 1080 by 2400‑pixel resolution, offering vivid colors and deep contrasts typical of Samsung’s display technology. Powered by Android 11 out of the box and equipped with 8 GiB of RAM, the device is positioned to handle everyday tasks and multitasking with responsiveness.
Inside, a 4000 mAh battery fuels the phone, supporting wired charging at up to 15 watts to replenish power quickly when needed. The handset accommodates a single SIM card, keeping the tray simple and the overall build streamlined. These specifications combine to create a smartphone that balances a premium display, solid performance and practical endurance in a pocket‑friendly package.
This variant is the US‑market SM‑G991U model with 128 GB of storage and 5G UW/TD‑LTE support, unlike the base model which omits carrier and storage details. It differs from the other listed variant, which provides 256 GB, by offering half the capacity while sharing the same US 5G UW/TD‑LTE configuration.
Technical Specifications
All NR bands (1)
- NR 600 MHz (N71)
All TD-NR bands (3)
- TD-NR 2500 MHz (N41)
- TD-NR 28 GHz (N261) bands
- TD-NR 39 GHz (N260)
All LTE bands (16)
- LTE 1700/2100 MHz (Band 4, AWS)
- LTE 1700/2100 MHz (Band 66)
- LTE 1800 MHz (Band 3)
- LTE 1900 MHz (Band 2, PCS)
- LTE 1900 MHz (Band 25)
- LTE 2100 MHz (Band 1)
- LTE 2600 MHz (Band 7)
- LTE 600 MHz (Band 71)
- LTE 700 MHz (Band 12)
- LTE 700 MHz (Band 13)
- LTE 700 MHz (Band 28)
- LTE 700 MHz (Band XIV)
- LTE 800 MHz (Band 20)
- LTE 850 MHz (Band 26)
- LTE 850 MHz (Band 5)
- LTE 900 MHz (Band 8)
All TD-LTE bands (6)
- TD-LTE 1900 MHz (Band 39)
- TD-LTE 2300 MHz (Band XL)
- TD-LTE 2500 MHz (Band XLI)
- TD-LTE 2600 MHz (Band 38)
- TD-LTE 3600 MHz (Band 48)
- TD-LTE 5900 MHz (Band XLVI)
All UMTS bands (5)
- UMTS 1700/2100MHz (Band IV, AWS)
- UMTS 1900MHz (Band II, PCS)
- UMTS 2100MHz (Band I, IMT)
- UMTS 850MHz (Band V, CLR)
- UMTS 900MHz (Band VIII)
All GSM bands (4)
- GSM 1800MHz (B3)
- GSM 1900MHz (PCS, B2)
- GSM 850MHz (B5)
- GSM 900MHz (B8)
All CDMA bands (3)
- CDMA 1900MHz (BC1/BC14, PCS)
- CDMA 800MHz (BC0, 850)
- CDMA 800MHz (BC10)
Model Variants
1 other phones with the same base model: Samsung Galaxy S21
