Samsung Galaxy S21 vs Xiaomi Mi 11 Ultra (256GB/8GB)
Side by side comparison between Samsung Galaxy S21 vs Xiaomi Mi 11 Ultra phones, differences, pros, cons and full specifications. What's the better?
,
6.2"
AMOLED
AMOLED
1080x2400
12.2
MP
MP
10mp
8GB
RAM
RAM
Octa-core
4000
mAh
mAh
(Non removable)
vs
6.81"
AMOLED
AMOLED
1440x3200
50
MP
MP
20mp
8GB
RAM
RAM
Octa-core
5000
mAh
mAh
(Non removable)
What's the better phone? Xiaomi Mi 11 Ultra (256GB/8GB)
The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!
10 Advantages 
14 Advantages | 35 Common items in both devices |
| 8GB LPDDR5 |
| UFS 3.1 |
| HDR10+ / Dolby Vision/HDR10+ |
| 120Hz |
| Digital and optical zoom |
| PDAF: phase detection autofocus on both cameras / PDAF: phase detection autofocus |
| OIS: Optical stabilization |
| +28 specs and more in the table below |
Check the comparison table below for more items that are not evaluated in comparison score above.
Highlight differences Clear highlight📱 Model features | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Change model | ||
| Model | Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) |
| Other model names | Galaxy S21 5G SM-G991B/DS | Xiaomi Mi 11 Ultra (256GB + 8GB RAM) |
| Country or region available |  (Global, International) | (Global, International) |
| Brand | Samsung | Xiaomi |
| Release date | 1/29/2021, Announced: 1/14/2021 | 4/2/2021, Announced: 3/29/2021 |
| Depth | 7.9 millimeters (0.31 inches) | 8.38 millimeters (0.33 inches) |
| Size (width x height) | 71.2 x 151.7 millimeters (2.8 x 5.97 in) | 74.6 x 164.3 millimeters (2.94 x 6.47 in) |
| Weight | 169 grams (5.92 ounces) | 234 grams (8.19 ounces) |
| Build, materials | Aluminum body, glass front, plastic back | Aluminum body, glass front, ceramic back |
| Protection against water and others | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant | IP68 certified: water-resistant up to 1.5 meters for 30min and dust-resistant |
📲 Display | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Display type | Dynamic AMOLED | AMOLED |
| Screen size | 6.2" inches | 6.81" inches |
| Screen-to-body ratio | ~85.9% (screen-to-body ratio) | ~91.4% (screen-to-body ratio) |
| Display resolution | 1080x2400 pixels (20:9) | 1440x3200 pixels (20:9) |
| Touchscreen | Capacitive Multitouch 10-points | Capacitive Multitouch |
| Pixel density (dot pitch) | 424 PPI | 515 PPI |
| Colors | 16 million | 1 billion |
| Scratch-resistant glass | Gorilla Glass Victus | Gorilla Glass Victus |
| Refresh rate | 120Hz | 120Hz |
| Display features | 1300nits[peak] HDR10+ Always-On Display | 1700nits[peak] Dolby Vision/HDR10+ |
🤖 Operating System | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| System version | Android 11 | Android 11 |
| Firmware update | Android 15 | feature not registered |
| User Interface | One UI 3.1 / 4.1 / 5.1 / 6.0 / 7.0 | feature not registered |
⚙️ Processor | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Chipset | 64bit: Samsung Exynos 2100 (5nm) | 64bit: Qualcomm Snapdragon 888 (SM8350) (5nm) |
| CPU | Octa-core, 3 processors: 1x 2.9GHz ARM Cortex-X1 (Single-core) 3x 2.8GHz ARM Cortex-A78 (Triple-core) 4x 2.2GHz ARM Cortex-A55 (Quad-core) | Octa-core, 3 processors: 1x 2.84GHz Kryo 680 (Single-core) 3x 2.42GHz Kryo 680 (Triple-core) 4x 1.8GHz Kryo 680 (Quad-core) |
| GPU graphical controller | ARM Mali-G78 MP14 (854MHz) | Qualcomm Adreno 660 (840MHz) |
| Performance (benchmark) | feature not registered | feature not registered |
💽 Memory and storage | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| RAM memory | 8GB LPDDR5 | 8GB LPDDR5 |
| Internal storage | 128GB (104GB available) UFS 3.1 | 256GB (230GB available) UFS 3.1 |
| External storage | Not supported | Not supported |
📶 Mobile networks | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| 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) + e-SIM | 2 slots (Dual-SIM) nano-SIM (4FF) |
| Maximum Download / Upload | 5000/1920 Mbps | 3500/1024 Mbps |
| Network technology | 2G, 3G, 4G, 5G | 2G, 3G, 4G, 5G |
| Frequency, bands | Expand band details Collapse details | |
| GSM MHz band | Quad-Band 850/900/1800/1900 | Quad-Band 850/900/1800/1900 |
| Primary 2G network | CDMA 800/1900, GSM 850/900/1800/1900 | CDMA 800, GSM 850/900/1800/1900 |
| Primary 3G network | CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1700/1900/2100 | CDMA2000 1xEV-DO UMTS 850/900/1700/1900/2100 |
| Primary 4G network | LTE Cat24 () TD-LTE () VoLTE | LTE Cat20 VoLTE Global version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 32, 66) TD-LTE (38, 40, 41, 42) China version: LTE (1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28) TD-LTE (34, 38, 39, 40, 41, 42) |
| Primary 5G network | SA/NSA/Sub6 () | Global version: SA/NSA (1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78, 79) China version: SA/NSA (1, 3, 28, 41, 77, 78, 79) |
| 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, SA/NSA, Sub6 | GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A, SA/NSA |
| Secondary 2G network | GSM 850/900/1800/1900 | GSM 850/900/1800/1900 |
| Secondary 3G network | UMTS 850/900/1700/1900/2100 | Not supported |
| Secondary 4G network | LTE Cat24 () TD-LTE () VoLTE | Not supported |
| Secondary data network | GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A | GPRS, EDGE |
📷 Camera | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Back camera (main camera) | (triple camera) 12.2 megapixels 64MP telephoto f/2.029mm1/1.72"0.8µmPDAFOIS1.1x-optical-zoom3x-hybrid-zoom 12MP ultrawide f/2.213mm120°1/2.55"1.4µmSuper-Steady-video | (triple camera) 50 megapixels 48MP periscope telephoto f/4.1120mm1/2.0"0.8µmPDAFOIS5x-optical-zoom 48MP ultrawide f/2.212mm128°1/2.0"0.8µmPDAF |
| Main camera resolution | 4032x3024 pixels | 8160x6120 pixels |
| Video recording (primary) | 8K UHD (7680x4320) 24 fps | 8K UHD (7680x4320) 24 fps |
| Flash | LED flash | Dual-LED flash |
| Focal aperture | f/1.8 (aperture) | f/2.0 (aperture) |
| Focal length | 26mm (lens) | 24mm (lens) |
| Sensor size | 1/1.76" inches | 1/1.12" inches |
| Pixel size | 1.8µm pixel | 1.4µm pixel |
| Autofocus | PDAF: phase detection autofocus on both cameras | PDAF: phase detection autofocus |
| Touch focus | Supported | Supported |
| Image stabilization | OIS: Optical stabilization | OIS: Optical stabilization |
| Zoom | Digital and optical zoom | Digital and optical zoom |
| Face/smile detection | Face detection, Smile detection | Face detection, Smile detection |
| BSI sensor | Supported | Supported |
| HDR | HDR photo/video on both cameras | HDR photo/video on both cameras |
| Camera extras | 4K@60fps 1080p@240fps 720p@960fps | feature not registered |
📸 Front camera | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Front camera (secondary) | 10 megapixels | 20 megapixels |
| Front camera resolution | 3872x2592 pixels | 5184x3840 pixels |
| Video recording (secondary) | 4K UHD (3840x2160) | 4K UHD (3840x2160) |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | f/2.2 (aperture) |
| Focal length | 26mm (lens) | 27mm (lens) |
| Sensor size | 1/3.24" inches | 1/3.4" inches |
| Pixel size | 1.22µm pixel | 0.8µm pixel |
🔉 Sound and multimedia | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Loudspeaker | Stereo sound 32-bit/384kHz Dolby Atmos Tuned by AKG | Supported |
| Active noise cancellation | 2 microphones | 2 microphones or more |
| Radio | FM | Not supported |
| 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 | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| USB | USB 3.2 Type-C, USB OTG On-The-Go | USB 2.0 Type-C, USB OTG On-The-Go |
| Audio output | Type-C reversible connector | Type-C jack with 3.5mm jack adapter |
| 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 | Supported | Supported |
| GPS | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou | A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou, QZSS, NavIC |
| NFC | Supported | Supported |
| Infrared port | Not supported | Supported |
🧭 Sensors | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Sensors | Accelerometer Ambient light sensor Barometer Compass Face unlock Fingerprint sensor (under display) Gesture Gyroscope Hall effect Proximity sensor | Accelerometer Ambient light sensor Compass Face unlock Fingerprint sensor (under display) Gyroscope Proximity sensor |
| Vibrating alert | Supported | Supported |
🔋 Battery | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| Battery type | LiPo: li-ion polymer (Non removable) | LiPo: li-ion polymer (Non removable) |
| Battery capacity | 4000 mAh | 5000 mAh |
| Charger, watts | 25W Wired fast charging USB Power Delivery 3.0 | 67W Wired fast charging Quick Charge 4+ USB Power Delivery 3.0 |
| Inductive / wireless charging | 15W Qi wireless charging (Qi/PMA) 4.5W Reverse wireless charging | 67W Qi wireless charging 10W Reverse wireless charging |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
➕ Other features | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| 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: Phantom Gray, White, Violet, Pink • Samsung Pay (Visa, MasterCard) • Samsung DeX | • Colors: Ceramic black, Ceramic white • MIUI 12.5 • Screen protector included • Protective case included • 24-bit/192kHz audio • Tuned by Harman Kardon • Secondary 1.1" AMOLED display next to the rear camera |
☢️ Radiation rate | ||
| Galaxy S21 | Xiaomi Mi 11 Ultra (256GB/8GB) | |
| SAR 1.6W/kg (USA, Mexico, etc.) | feature not registered | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.456W/kg (head), 1.509W/kg (body) | feature not registered |