In depth comparison and review of Samsung Galaxy S21 Ultra 5G and Xiaomi MI 11. Compare sizes, cameras, batteries, memory, and other important specifications and features to easily choose the right phone for you. Our goal is to help you uncover differences between the products and find the phone that will best fit your needs.
| DESIGN AND DIMENSIONS | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-G998B/DS | - | |
| Form Factor | Touch | Touch | |
| Height | 161.5 mm | 164.3 mm | Xiaomi MI 11 has greater height than Samsung Galaxy S21 Ultra 5G. |
| Width | 75.6 mm | 74.6 mm | Samsung Galaxy S21 Ultra 5G has greater width than Xiaomi MI 11. |
| Depth | 8.9 mm | 8.06 mm | Xiaomi MI 11 is narrower than Samsung Galaxy S21 Ultra 5G. |
| Weight | 227 g | 196 g | Xiaomi MI 11 is lighter than Samsung Galaxy S21 Ultra 5G. |
| Body Colour | Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium | Midnight grey | Horizon blue | |
| Protection | Dustproof, splashproof, water-resistant | - | |
| Waterproof (Water-resistant) | Yes | - | Samsung Galaxy S21 Ultra 5G is waterproof. |
| IP rating | IP68 | - | |
| SAR Value | 1.58 W/kg (body), 0.714 W/kg (head), 2.56 W/kg (limb) | 0.555 W/kg (head), 1.986 W/kg (limb), 0.982 W/kg (body) | |
| Connector Type | USB Type-C - 24 pin USB-C | USB Type-C - 24 pin USB-C | |
| SIM Card Type (Size) | Nano SIM, Electronic SIM card (e-SIM) | - | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | Infinity-O Dynamic AMOLED 2X | AMOLED | |
| Screen Size (Display Size) | 6.8" | 6.81" | Xiaomi MI 11 has larger screen size than Samsung Galaxy S21 Ultra 5G. |
| Screen Resolution (Display Resolution) | 3200 x 1440 pixels | 3200 x 1440 pixels | Both phones have the same screen resolution. |
| Display Format | QHD+ | WQHD+ | |
| Pixel Density | 515 ppi | 515 ppi | Both phones have the same pixel density. |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 1500 cd/m² | |
| Colour Depth | 16.7 million colours | 1.07 billion colours | Xiaomi MI 11 has better colour depth than Samsung Galaxy S21 Ultra 5G. |
| Contrast Ratio | - | 5000000:1 | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | HDR10+ | HDR10+ | |
| Display Enhancement Technology | Eye Comfort Shield | Sunlight mode 3.0 | |
| Display Refresh Rate | 120 Hz | 120 Hz | Both phones have the same refresh rate. |
| Touch Sampling Rate | - | 480 Hz | |
| Display Features | Edge Screen, AOD(Always On Display) | DCI-P3 Wide colour gamut, Dot Display, True Colour, Reading mode 3, AdaptiveSync technology, Quad-curved display, AI display, DisplayMate A+, hardware-level mistouch sensor, Super Resolution technology | |
| Display Protection (Screen Protector) | Corning Gorilla Glass Victus (scratch resistant glass) | Corning Gorilla Glass Victus (scratch resistant glass) |
| PROCESSOR | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Processor Type (CPU) | Samsung Exynos 2100 | Qualcomm Snapdragon 888 | |
|---|---|---|---|
| Clock Speed | 2.9 GHz | 2.84 GHz | Samsung Galaxy S21 Ultra 5G has higher clock speed than Xiaomi MI 11. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Mali-G78 MP14 | Qualcomm ADRENO 660 |
| MEMORY | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| RAM | LPDDR5 SDRAM - 12 GB | LPDDR5 SDRAM - 8 GB | Samsung Galaxy S21 Ultra 5G has more RAM than Xiaomi MI 11. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 128 GB | Both phones have the same internal memory capacity. |
| User Memory | 101.7 GB | - | |
| Memory Interface | - | UFS 3.1 |
| CAMERA | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 4 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 108 Megapixel | Xiaomi MI 11 has better camera resolution than Samsung Galaxy S21 Ultra 5G. |
| Sensor Size | - | 1/1.33" | |
| Lens Type | Ultra wide-angle lens | - | |
| Lens Aperture | F/2.2 | F/1.85 | Xiaomi MI 11 has better lens aperture than Samsung Galaxy S21 Ultra 5G. |
| Field of View (FoV) | 120 degree(s) | - | |
| Pixel Size | 1.4 μm | 0.8 μm | Samsung Galaxy S21 Ultra 5G has larger camera pixel size than Xiaomi MI 11. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Both phones have optical image stabilization. |
| Focus Adjustment | Automatic | - | |
| Laser Auto Focus | Yes | - | |
| Optical Zoom | 3x | - | |
| Digital Zoom | 100x | - | |
| Self-Timer Delay | Yes | - | |
| Special Effects | Face retouch, Grid Line | Cinematic video filters | |
| HDR Mode | Auto HDR mode | HDR10+ video | |
| Camera Modes | Panorama, Slow motion mode, Pro mode, HYPERLAPSE, Super Slow-mo, Flowers, Greenery, Trees, Sky, Beaches, Watersides, Snow, Backlit, Text, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Night, Motion Photo, Mountain, Single Take, Pro Video, Director's View | Slow Shutter, Night Mode 2.0, AI Erase 2.0, Ultra Night Video, One-Click AI Cinema, Magic Zoom, Time Freeze, Night Time-lapse, Parallel World, Freeze Frame Video, Pro Time-lapse | |
| Light Source | High CRI LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 7680 x 4320 (UHD 8K) at 24fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 fps | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 1280 x 720 (720p) at 30 fps, Slo-mo video 1920 x 1080 (1080p) at 120 fps, Slo-mo video 1280 x 720 (720p) at 240 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps, 3840 x 2160 (4K) at 60 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, 7680 x 4320 (8K) at 24 fps, 7680 x 4320 (8K) at 30fps | |
| Camera Features (Functions) | Playback zoom, blink detection, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, Scene Optimiser, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, Quick Measure, Zoom-In Mic, Space Zoom, Take 33MP still photos while playing 8K video, Hybrid Optic Zoom 3x, Super Resolution Zoom up to 30x, Digital zoom up to 12x for video | 4-in-1 Super Pixel |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 108 Megapixel | 13 Megapixel | Samsung Galaxy S21 Ultra 5G has better second camera resolution than Xiaomi MI 11. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/1.33" | - | |
| Lens Type (2nd Camera) | Wide-angle lens | Ultra wide-angle lens | |
| Lens Aperture (2nd Camera) | F/1.8 | F/2.4 | Samsung Galaxy S21 Ultra 5G has better second camera lens aperture than Samsung Galaxy S21 Ultra 5G. |
| Field of View (2nd Camera) | 83 degree(s) | 123 degree(s) | Xiaomi MI 11 has larger second camera lens field of view than Samsung Galaxy S21 Ultra 5G. |
| Pixel Size (2nd Camera) | 0.8 μm | - | |
| Camera Features (2nd Camera) | Phase Detect Auto-Focus (PDAF), OIS (Optical Image Stabilisation) | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 10 Megapixel | 5 Megapixel | Samsung Galaxy S21 Ultra 5G has higher resolution third camera than Xiaomi MI 11. |
|---|---|---|---|
| Lens Type (3rd Camera) | Telephoto lens | - | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.4 | Both phones have the same lens aperture of the third camera. |
| Field of View (3rd Camera) | 35 degree(s) | - | |
| Pixel Size (3rd Camera) | 1.22 μm | - | |
| Camera Features (3rd Camera) | Dual Pixel AF | AF (3cm-10cm) |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 10 Megapixel | - | |
|---|---|---|---|
| Lens Type (4th Camera) | Telephoto lens | Tele-macro lens | |
| Lens Aperture (4th Camera) | F/4.9 | - | |
| Field of View (4th Camera) | 10 degree(s) | - | |
| Pixel Size (4th Camera) | 1.22 μm | - | |
| Camera Features (4th Camera) | Dual Pixel AF | - |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 40 Megapixels | 20 Megapixel | Samsung Galaxy S21 Ultra 5G has better front camera resolution than Xiaomi MI 11. |
| Lens Aperture (Front) | F/2.2 | F/2.2 | Both phones have the same front camera lens aperture. |
| Field of View (Front) | 80 degree(s) | - | |
| Pixel Size (Front) | 0.7 μm | 0.8 μm | Xiaomi MI 11 has larger front camera pixel size than Samsung Galaxy S21 Ultra 5G. |
| Focus Adjustment | Automatic | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | - | Night Selfie | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, Slo-mo video 1280 x 720 (720p) at 120 fps | |
| Camera Features (Front) | Phase Detect Auto-Focus (PDAF) | 4-in-1 Super Pixel technology |
| BATTERY AND CHARGING | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 4600 mAh | Samsung Galaxy S21 Ultra 5G has larger battery capacity than Xiaomi MI 11. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 | - | Samsung Galaxy S21 Ultra 5G has fast charging technology. |
| Recharge Time (Charging Time) | - | 45 min | |
| Wireless Charging | Yes | Yes | Both phones can be charged wirelessly. |
| Wireless Charging Standards | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | - | |
| Talk Time | 2460 minutes | - | |
| Run Time Details | Talk (4G): up to 2460 min Active online usage (LTE): up to 18 hrs Active online usage (Wi-Fi): up to 18 hrs Playback (wireless video): up to 22 hrs Playback (wireless audio): up to 81 hrs |
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| CELLULAR | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 5G | Both phones have the same mobile network generation. |
| Operating System | Android 11 | Android 11 | |
| User Interface | - | MIUI 12 | |
| Intelligent Assistant | Bixby | - | |
| Payment Technology | Samsung Pay | Google Pay | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo |
| COMMUNICATIONS | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Data Transmission | FDD-LTE, TDD-LTE, 5G NR FR1 | FDD-LTE, TDD-LTE, 5G NR FR1 | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 2, Band 4, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1700, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 17, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 32, Band 38, Band 39, Band 40, Band 41, Band 66 | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 20, Band 28, Band 32, Band 38, Band 40, Band 41, Band 42, Band 66 | |
| 4G LTE Frequency | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700b, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700b, FDD 800 DD, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, TDD 3500, FDD 1700 - 2110 AWS-3 | |
| 5G NR Band | N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n77, n78, n40 | N1, n3, n5, n7, n8, n20, n28, n38, n41, n77, n78, n79 | |
| 5G NR Frequency | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD AWS-3, TDD TD 3700, TDD TD 3500, TDD 2300 | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, TDD TD 3700, TDD TD 3500, TDD TD 4500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac/ax | IEEE 802.11a/b/g/n/ac/ax, Infrared (IR) | |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.2 | |
| NFC | Yes | - | Samsung Galaxy S21 Ultra 5G has NFC reader for mobile payments. |
| Modem | - | Snapdragon X60 5G |
| MEDIA | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Supported Digital Audio Standards | WAV, WMA, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, DSD, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128 | AAC, LDAC, LHDC | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 | - | |
| Sound Enhancements | Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound | Hi-Res audio certified |
| FEATURES | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor | Accelerometer, proximity sensor, digital compass, gyroscope, 360° ambient light sensor 2.0 | |
| Security Devices | Fingerprint reader (under display), face recognition | Fingerprint reader (under display with heart rate monitoring), face recognition | |
| Additional Phone Features | Air View, MIMO technology, Smart Select, Samsung KNOX, Smart View, Live message, Screen off memo, Bixby Vision, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, AR Doodle, PENUP, Bixby key, Samsung Knox Vault, Private Share function, Enhanced Game Booster, Air Command | MIMO technology, AI face unlock, linear motor, 10W reverse wireless charging, dual stereo speakers tuned by Harman Kardon, X-axis linear vibration motor, Voice isolation, Qualcomm 6th generation AI Engine |
| OTHERS | Samsung Galaxy S21 Ultra 5G | Xiaomi MI 11 |
|---|
| Included Accessories | SIM card removal tool, USB-C to USB-C cable | SIM card removal tool, USB-C to 3.5 jack adapter, USB-C cable, soft case, 55W GaN power adapter | |
|---|---|---|---|
| Compliant Standards | IP68, HAC (Hearing Aid Compatible) | SGS Eye Care Display Certification | |
| Max Depth of Water Resistance | 1.5 m | - |
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