📱 Model features |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Model | Black Shark 3S (128GB) | Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Other model names | 小米 Black Shark 3S 5G (128GB + 12GB RAM) | Galaxy S21 Ultra 5G (SM-G998B/Dual-SIM) |
| Country or region available | 
(Global, International) |
(Global, International) |
| Brand | Xiaomi | Samsung |
| Release date | 8/4/2020, Announced: 7/31/2020 | 1/29/2021, Announced: 1/14/2021 |
| Depth | 10.4 millimeters (0.41 inches) | 8.9 millimeters (0.35 inches) |
| Size (width x height) | 77.33 x 168.72 millimeters (3.04 x 6.64 in) | 75.6 x 165.1 millimeters (2.98 x 6.5 in) |
| Weight | 222 grams (7.77 ounces) | 227 grams (7.95 ounces) |
| Build, materials | Aluminum body, glass front | Aluminum frame, glass front/back |
| Protection against water and others | Not supported | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
🤖 Operating System |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| System version | Android 10 | Android 11 |
| Firmware update | Android 11 | Android 12 |
| User Interface | JOYUI 12 | One UI 3.1 / 4.0 |
⚙️ Processor |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Chipset | 64bit - Qualcomm Snapdragon 865 (SM8250) (7nm) | 64bit - Samsung Exynos 2100 (5nm) |
| CPU | Octa-Core, 3 processors:
2.84GHz Single-Core Kryo 585
2.42GHz Triple-Core Kryo 585
1.8GHz Quad-Core Kryo 585 | Octa-Core, 3 processors:
2.9GHz Single-Core ARM Cortex-X1
2.8GHz Triple-Core ARM Cortex-A78
2.2GHz Quad-Core ARM Cortex-A55 |
| GPU graphical controller | Qualcomm Adreno 650 (250-587MHz) | ARM Mali-G78 MP14 (854MHz) |
| Performance (benchmark) | AnTuTu: 618083 (v8) | AnTuTu: 657150 (v8), 727634 (v9)
Geekbench: 3457 (v5.2)
GFXBench: 51fps (ES 3.1 onscreen) |
💽 Memory and storage |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| RAM memory | 12GB LPDDR5 | 12GB LPDDR5 |
| Internal storage | 128GB (108GB available)
UFS 3.1 | 128GB (101GB available)
UFS 3.1 |
| External storage | Not supported | Not supported |
📲 Display |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Display type | AMOLED | Dynamic AMOLED |
| Screen size | 6.67" inches | 6.8" inches |
| Screen-to-body ratio | ~82.3% (screen-to-body ratio) | ~89.4% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 1440x3200 pixels (20:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch 10-points |
| Pixel density (dot pitch) | 395 PPI | 516 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Gorilla Glass Victus |
| Display features | 120Hz, 500nits[typ]
HDR10+
Always-On Display | 120Hz, 1500nits[peak]
HDR10+
Always-On Display |
📶 Mobile networks |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Dual-SIM | Dual-SIM Standby - Call active on one sim card | Dual-SIM Standby - Call active on one sim card |
| SIM card | 2 slots (Dual-SIM)
nano-SIM (4FF) | 2 slots (Dual-SIM)
nano-SIM (4FF) + e-SIM |
| Maximum download/upload | 2000/1024 Mbps | 5000/1920 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band detailsCollapse details |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800, GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 800/850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat20 (1, 3, 4, 5, 7, 8, 12, 17, 20)
TD-LTE (34, 38, 39, 40, 41)
VoLTE | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE |
| Primary 5G network | SA/NSA (41, 78, 79) | SA/NSA/Sub6 (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78) |
| Primary data network | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 800/850/900/1700/1900/2100 | UMTS 850/900/1700/1900/2100 |
| Secondary 4G network | LTE Cat20 (1, 3, 4, 5, 7, 8, 12, 17, 20)
TD-LTE (34, 38, 39, 40, 41)
VoLTE | LTE Cat20 (1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 66)
TD-LTE (38, 39, 40, 41)
VoLTE |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, 5G SA/NSA |
📷 Camera |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Back camera (main camera) | (triple camera)
64 megapixels
13MP ultrawidef/2.3120°
5MP depthf/2.2 | (quad camera)
108 megapixels
10MP periscope telephotof/4.9240mm1/3.24"1.22µmPDAFOIS10x-optical-zoom
10MP telephotof/2.470mm1/3.24"1.22µmPDAFOIS3x-optical-zoom
12MP ultrawidef/2.213mm1/2.55"1.4µmPDAFSuper-Steady-video |
| Main camera resolution | 10120x6328 pixels | 12000x9000 pixels |
| Video recording (primary) | 4K UHD (3840x2160) 60 fps | 8K UHD (7680x4320) 24 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/1.8 (aperture) | f/1.8 (aperture) |
| Focal length | 26mm lens | 26mm lens |
| Sensor size | 1/1.72" inches | 1/1.33" inches |
| Pixel size | 0.8µm pixel | 1.8µm pixel |
| Autofocus | PDAF: phase detection autofocus | PDAF: phase detection autofocus on both cameras |
| Touch focus | Supported | Supported |
| Image stabilization | EIS: Digital stabilization | OIS: Optical stabilization |
| Zoom | Only digital zoom | Digital and optical zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo on both cameras | HDR photo/video on both cameras |
| Camera extras | 1080p@240fps
720p@1920fps | 4K@60fps
1080p@240fps
720p@960fps |
📸 Front camera |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Front camera (secondary) | 20 megapixels | 40 megapixels |
| Front camera resolution | 5184x3840 pixels | 7296x5472 pixels |
| Video recording (secondary) | Full HD (1920x1080) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.0 (aperture) | f/2.2 (aperture) |
| Focal length | feature not registered | 26mm lens |
| Sensor size | 1/3" inches | 1/2.8" inches |
| Pixel size | 0.9µm pixel | 0.7µm pixel |
🔉 Sound and multimedia |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Loudspeaker | Stereo sound | Stereo sound
32-bit/384kHz
Dolby Atmos
Tuned by AKG |
| Active noise cancellation | 2 microphones or more | 2 microphones or more |
| Radio | Not supported | FM |
| TV | Not supported | Not supported |
| Video formats | MP4, H.265, H.264, H.263, XviD, MKV | MP4, H.265, H.264, H.263, XviD, MKV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, WMA, eAAC+, FLAC |
🔌 Connectivity |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| USB | USB 2.0 Type-C, USB OTG On-The-Go | USB 3.2 Type-C, USB OTG On-The-Go |
| Audio output | 3.5mm jack | Type-C reversible connector |
| TV output | USB Type-C (reversible) | USB Type-C (reversible) |
| Bluetooth | 5.0 + A2DP/LE | 5.2 + A2DP/LE |
| WiFi | 802.11 a/b/g/n/ac/ax wifi6 (2.4Ghz, 5Ghz) + MIMO
WiFi Direct, hotspot | 802.11 a/b/g/n/ac/ax wifi6 (2.4Ghz, 5Ghz) + MIMO
WiFi Direct, hotspot |
| DLNA | Not supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou |
| NFC | Not supported | Supported |
| Infrared port | Not supported | Not supported |
🧭 Sensors |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Sensors | Accelerometer
Ambient Light sensor
Compass
Face unlock
Fingerprint sensor (under display)
Gyroscope
Proximity sensor | Accelerometer
Ambient Light sensor
ANT+
Barometer
Compass
Face unlock
Fingerprint sensor (under display)
Gesture
Gyroscope
Hall effect
Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Battery type | LiPo: Li-Ion polymer (Non removable) | LiPo: Li-Ion polymer (Non removable) |
| Battery capacity | 4729 mAh | 5000 mAh |
| Charger, watts | 65W Fast battery charging
Magnetic charging (dock)
Quick Charge 4 | 25W Fast battery charging
15W Qi wireless charging (Qi/PMA)
4.5W Reverse wireless charging between devices
USB Power Delivery 3.0 |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (T9), MMS, E-mail, Push mail |
| Hands-free calling | Supported | Supported |
| Video calling | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Antenna | Internal antenna | Internal antenna |
| Qwerty physical keyboard | Not supported | Not supported |
| Miscellaneous | - Colors: Sky Cloud Black, Crystal Blue
- Liquid Cooling System
- Physical pop-up gaming triggers | - Colors: Phantom Black, Silver, Titanium, Navy, Brown
- Samsung Pay (Visa, MasterCard)
- Samsung DeX
- Stylus pen support |
☢️ Radiation rate |
| Xiaomi Black Shark 3S (128GB) | Samsung Galaxy S21 Ultra (SM-G998B/DS 128GB) |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | 0.24W/kg (head), 0.72W/kg (body) |
| SAR 2W/kg (Europe, UK, etc.) | feature not registered | 0.714W/kg (head), 1.58W/kg (body) |