| Local Name | Galaxy S21 Ultra 5G |
| Additional Information | Versions: SM-G998B, SM-G998B/DS (International); SM-G998U (USA); SM-G998U1 (USA unlocked); SM-G998W (Canada); SM-G998N (Korea); SM-G9980 (China) |
| Technology | GSM / CDMA / HSPA / EVDO / LTE / 5G |
| 4G Bands | 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G998U1 | 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - SM-G998B |
| 3G Bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | CDMA2000 1xEV-DO |
| 2G Bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only) | CDMA 800 / 1900 & TD-SCDMA |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL) |
| Announced | 2021, January 14 |
| Status | Available. Released 2021, January 29 |
| Dimensions | 165.1 x 75.6 x 8.9 mm (6.5 x 2.98 x 0.35 in) |
| Weight | 227 g (Sub6), 229 g (mmWave) (8.01 oz) |
| Build | Glass front (Gorilla Glass Victus), glass back (Gorilla Glass Victus), aluminum frame |
| SIM | Nano-SIM and eSIM or Dual SIM (2 Nano-SIMs and eSIM, dual stand-by) |
| Body | IP68 dust/water resistant (up to 1.5m for 30 min) Stylus support |
| Display Type | Li-Ion 5000 mAh, non-removable |
| Screen Size | 6.8 inches, 112.1 cm2 (~89.8% screen-to-body ratio) |
| Resolution | 1440 x 3200 pixels, 20:9 ratio (~515 ppi density) |
| Protection | Corning Gorilla Glass Victus | Always-on display |
| OS | Android 11, upgradable to Android 13, One UI 5.1 |
| Chipset | Exynos 2100 (5 nm) - InternationalQualcomm SM8350 Snapdragon 888 5G (5 nm) - USA/China |
| CPU | Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - InternationalOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - USA/China |
| GPU | Mali-G78 MP14 - InternationalAdreno 660 - USA/China |
| Card Slot | No |
| Internal Memory | 128GB 12GB RAM, 256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM | UFS 3.1 |
| Camera Features | Dual video call, Auto-HDR |
| Video | 4K@30/60fps, 1080p@30fps |
| Loudspeaker | Yes, with stereo speakers |
| 3.5mm Jack | No |
| Sound | 32-bit/384kHz audio Tuned by AKG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6e, dual-band, Wi-Fi Direct |
| Bluetooth | 5.2, A2DP, LE |
| NFC | Yes |
| Radio | FM radio (Snapdragon model only; market/operator dependent) |
| USB | USB Type-C 3.2, OTG |
| Sensors | Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer |
| Features Summary | Samsung DeX, Samsung Wireless DeX (desktop experience support), Bixby natural language commands and dictation, Samsung Pay (Visa, MasterCard certified), Ultra Wideband (UWB) support |
| Colors | Phantom Black, Phantom Silver, Phantom Titanium, Phantom Navy, Phantom Brown, Navy |
| SAR EU | 0.71 W/kg (head) 1.58 W/kg (body) |
