In depth comparison and review of Samsung Galaxy S21 Ultra 5G and Xiaomi 13. 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 13 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-G998B/DS | - | |
| Form Factor | Touch | Touch | |
| Height | 161.5 mm | 152.8 mm | Samsung Galaxy S21 Ultra 5G has greater height than Xiaomi 13. |
| Width | 75.6 mm | 71.5 mm | Samsung Galaxy S21 Ultra 5G has greater width than Xiaomi 13. |
| Depth | 8.9 mm | 7.98 mm | Xiaomi 13 is narrower than Samsung Galaxy S21 Ultra 5G. |
| Weight | 227 g | 189 g | Xiaomi 13 is lighter than Samsung Galaxy S21 Ultra 5G. |
| Body Colour | Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium | Black | |
| Protection | Dustproof, splashproof, water-resistant | Water-resistant, splash-resistant, dust-resistant | |
| Waterproof (Water-resistant) | Yes | Yes | Both phones are waterproof. |
| IP rating | IP68 | IP68 | |
| SAR Value | 1.58 W/kg (body), 0.714 W/kg (head), 2.56 W/kg (limb) | 0.997 W/kg (body), 0.998 W/kg (head), 2.576 W/kg (limb) | |
| 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) | Nano SIM, Electronic SIM card (e-SIM) | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | Infinity-O Dynamic AMOLED 2X | AMOLED E6 | |
| Screen Size (Display Size) | 6.8" | 6.36" | Samsung Galaxy S21 Ultra 5G has larger screen size than Xiaomi 13. |
| Screen Resolution (Display Resolution) | 3200 x 1440 pixels | 2400 x 1080 pixels | Samsung Galaxy S21 Ultra 5G has better screen resolution than Xiaomi 13. |
| Display Format | QHD+ | Full HD+ | |
| Pixel Density | 515 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 1900 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| HDR | Yes | Yes | Both phones have HDR. |
| HDR Technology | HDR10+ | HDR10+ | |
| Display Enhancement Technology | Eye Comfort Shield | Dolby Vision, AdaptiveSync technology, Pro HDR display | |
| Display Refresh Rate | 120 Hz | 120 Hz | Both phones have the same refresh rate. |
| Touch Sampling Rate | - | 240 Hz | |
| Display Features | Edge Screen, AOD(Always On Display) | DCI-P3 Wide colour gamut, True Colour, JNCD 0.32, Delta-E 0.36 | |
| Display Protection (Screen Protector) | Corning Gorilla Glass Victus (scratch resistant glass) | - |
| PROCESSOR | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| Processor Type (CPU) | Samsung Exynos 2100 | Qualcomm Snapdragon 8 Gen 2 | |
|---|---|---|---|
| Clock Speed | 2.9 GHz | - | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Mali-G78 MP14 | Qualcomm ADRENO |
| MEMORY | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| RAM | LPDDR5 SDRAM - 12 GB | LPDDR5X SDRAM - 8 GB | Samsung Galaxy S21 Ultra 5G has more RAM than Xiaomi 13. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 256 GB | Xiaomi 13 has more internal memory than Samsung Galaxy S21 Ultra 5G. |
| User Memory | 101.7 GB | - | |
| Memory Interface | - | UFS 4.0 |
| CAMERA | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 50 Megapixel | Xiaomi 13 has better camera resolution than Samsung Galaxy S21 Ultra 5G. |
| Lens Type | Ultra wide-angle lens | - | |
| Lens Aperture | F/2.2 | F/1.8 | Xiaomi 13 has better lens aperture than Samsung Galaxy S21 Ultra 5G. |
| Lens Construction | - | 7-element | |
| Field of View (FoV) | 120 degree(s) | - | |
| Pixel Size | 1.4 μm | 1 μm | Samsung Galaxy S21 Ultra 5G has larger camera pixel size than Xiaomi 13. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Both phones have optical image stabilization. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Focal Length Equivalent to 35mm Camera | - | 23mm | |
| Optical Zoom | 3x | - | |
| Digital Zoom | 100x | 30x | Samsung Galaxy S21 Ultra 5G has better digital zoom than Xiaomi 13. |
| Self-Timer Delay | Yes | - | |
| Special Effects | Face retouch, Grid Line | HDR, Leica Authentic Look, Leica Vibrant Look, Leica filters, Leica classica shutter sound, Leica Watermark | |
| HDR Mode | Auto HDR mode | - | |
| 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 motion video, Panorama, Pro mode, night mode, Slow Shutter, Clone, Documents, Vlog mode, Pro Video mode, Night portrait mode, supermoon mode, Ultra Night Video, Magic Zoom, Time Freeze, Night Time-lapse, Parallel World, Freeze Frame Video, Long exposure mode, Lightning Burst | |
| Face Recognition (Face ID) | - | Face recognition | Xiaomi 13 has face detection. |
| 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, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, 3840 x 2160 (4K) at 24 fps, 7680 x 4320 (8K) at 24 fps | |
| 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 | One-click AI cinema, HDR video recording, Xiaomi ProFocus, Leica professional optical lens, HyperOIS, 35mm black and white lens, 50mm swirly boken lens, 90mm soft focus lens, Vario-Summicron 1:1.8-2.2/15-75 ASPH, 2.0μm 4-in-1 Super Pixel |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 108 Megapixel | 10 Megapixel | Samsung Galaxy S21 Ultra 5G has better second camera resolution than Xiaomi 13. |
|---|---|---|---|
| Sensor Size (2nd Camera) | 1/1.33" | 1/3.75" | Xiaomi 13 has better second camera sensor size than Samsung Galaxy S21 Ultra 5G. |
| Lens Type (2nd Camera) | Wide-angle lens | Telephoto lens | |
| Lens Aperture (2nd Camera) | F/1.8 | F/2.0 | 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) | - | |
| Pixel Size (2nd Camera) | 0.8 μm | 1 μm | Xiaomi 13 has larger second camera pixel size than Samsung Galaxy S21 Ultra 5G. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Xiaomi 13 has optical stabilisation of the second camera. |
| Focal Length Equivalent to 35mm Camera | - | 75mm | |
| Camera Features (2nd Camera) | Phase Detect Auto-Focus (PDAF), OIS (Optical Image Stabilisation) | - |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | 10 Megapixel | 12 Megapixel | Xiaomi 13 has higher resolution third camera than Samsung Galaxy S21 Ultra 5G. |
|---|---|---|---|
| Sensor Size (3rd Camera) | - | 1/3.06" | |
| Lens Type (3rd Camera) | Telephoto lens | Ultra wide-angle lens | |
| Lens Aperture (3rd Camera) | F/2.4 | F/2.2 | Xiaomi 13 has better third camera lens aperture than Samsung Galaxy S21 Ultra 5G. |
| Field of View (3rd Camera) | 35 degree(s) | - | |
| Pixel Size (3rd Camera) | 1.22 μm | 1.12 μm | Samsung Galaxy S21 Ultra 5G has larger third camera pixel size than Xiaomi 13. |
| Focal Length Equivalent to 35mm Camera | - | 15mm | |
| Camera Features (3rd Camera) | Dual Pixel AF | - |
| FOURTH CAMERA |
|---|
| Sensor Resolution (4th Camera) | 10 Megapixel | - | |
|---|---|---|---|
| Lens Type (4th Camera) | Telephoto 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 | 32 Megapixel | Samsung Galaxy S21 Ultra 5G has better front camera resolution than Xiaomi 13. |
| Lens Aperture (Front) | F/2.2 | F/2.0 | Xiaomi 13 has better front lens aperture than Samsung Galaxy S21 Ultra 5G. |
| Field of View (Front) | 80 degree(s) | 89.6 degree(s) | Xiaomi 13 has larger front lens field of view than Samsung Galaxy S21 Ultra 5G. |
| Pixel Size (Front) | 0.7 μm | 0.7 μm | Both phones have the same front camera pixel size. |
| Focus Adjustment | Automatic | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | - | Night mode, Vlog mode, AI portrait mode with bokeh and depth control, Video teleprompter | |
| Video Resolutions (Front) | - | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps | |
| Camera Features (Front) | Phase Detect Auto-Focus (PDAF) | 4-in-1 to 1.4μm Super Pixel, Dynamic Framing (0.8x / 1x) |
| BATTERY AND CHARGING | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 4500 mAh | Samsung Galaxy S21 Ultra 5G has larger battery capacity than Xiaomi 13. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 | Turbo charging | Both phones have fast charging technology. |
| Recharge Time (Charging Time) | - | 38 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 13 |
|---|
| 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 13 | |
| User Interface | - | MIUI 14 | |
| Intelligent Assistant | Bixby | - | |
| Payment Technology | Samsung Pay | Google Pay | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, NavIC |
| COMMUNICATIONS | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| 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 6, Band 8, Band 19 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 1900, 1700, 850, 800, 900, 800 | |
| 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 3, 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 42, Band 48, 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 1800+, 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, TDD 3500, TDD 3600, 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, n66, n71, n75, n78, n79, n40 | |
| 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, FDD AWS-3, FDD 600, SDL DL 1500+, TDD TD 3500, TDD TD 4500, TDD 2300 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac/ax | IEEE 802.11a/b/g/n/ac/ax/be | |
| Bluetooth | Bluetooth 5.2 | Bluetooth 5.3 | |
| NFC | Yes | Yes | Both phones have an NFC reader for mobile payments. |
| MEDIA | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| 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 | Dolby Atmos sound technology, Hi-Res audio certified, Hi-Res audio wireless | |
| Video Enhancements | - | HDR with Dolby Vision |
| FEATURES | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| Phone Functions | 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, barometer, flicker sensor, gyroscope, 360° ambient light sensor | |
| Security Devices | Fingerprint reader (under display), face recognition | Fingerprint reader (under display), face recognition | |
| Security Technology | - | AI face unlock | |
| 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, MU-MIMO technology, LiquidCool Technology, Reverse wireless charging, dual stereo speakers, X-axis linear vibration motor, IR blaster, Qualcomm FastConnect 7800, Xiaomi Surge charging chipset, Xiaomi Surge battery management chipset, Xiaomi surge battery management system |
| OTHERS | Samsung Galaxy S21 Ultra 5G | Xiaomi 13 |
|---|
| Included Accessories | SIM card removal tool, USB-C to USB-C cable | SIM card removal tool, USB-C cable, protective case, 67W charger | |
|---|---|---|---|
| Compliant Standards | IP68, HAC (Hearing Aid Compatible) | IP68, IEC 60529:1989+A1:1999+A2:2013 | |
| Max Depth of Water Resistance | 1.5 m | 1.5 m |
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