Xiaomi MI Max 3 vs. Samsung Galaxy S21 5G

Phone Comparison, Reviews and Tests

In depth comparison and review of Xiaomi MI Max 3 and Samsung Galaxy S21 5G. 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.

Phone Specifications Comparison

Xiaomi MI Max 3 vs. Samsung Galaxy S21 5G Comparison Chart
DESIGN AND DIMENSIONS Xiaomi MI Max 3 Samsung Galaxy S21 5G
Product Type Smartphone Smartphone
Manufacturer Model Number - SM-G991U1
Form Factor Touch Touch
Height 176.15 mm 151.7 mm Xiaomi MI Max 3 has greater height than Samsung Galaxy S21 5G.
Width 87.4 mm 71.2 mm Xiaomi MI Max 3 has greater width than Samsung Galaxy S21 5G.
Depth 7.99 mm 7.9 mm Samsung Galaxy S21 5G is narrower than Xiaomi MI Max 3.
Weight 221 g 171 g Samsung Galaxy S21 5G is lighter than Xiaomi MI Max 3.
Body Colour - Phantom grey | Phantom white
Protection - Dustproof, splashproof, water-resistant
Waterproof (Water-resistant) - Yes Samsung Galaxy S21 5G is waterproof.
IP rating - IP68
SAR Value 1.417 W/kg (body), 1.584 W/kg (head) 1.58 W/kg (simultaneous), 1.11 W/kg (wireless router), 1.08 W/kg (body), 0.74 W/kg (head)
Connector Type USB Type-C - 24 pin USB-C
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM Nano SIM, Electronic SIM card (e-SIM)
SIM Card Qty Dual-SIM Dual-SIM
SIM Card Configuration Details Nano SIM + nano SIM/microSD -
DISPLAY Xiaomi MI Max 3 Samsung Galaxy S21 5G
Display Type LCD display OLED display
Display Technology IPS Infinity-O Dynamic AMOLED 2X
Screen Size (Display Size) 6.9" 6.2" Xiaomi MI Max 3 has larger screen size than Samsung Galaxy S21 5G.
Screen Resolution (Display Resolution) 2160 x 1080 pixels 2400 x 1080 pixels Samsung Galaxy S21 5G has better screen resolution than Xiaomi MI Max 3.
Display Format Full HD+ Full HD+
Pixel Density - 421 ppi
Aspect Ratio 18:9 -
Max Brightness 520 cd/m² -
Colour Depth 16.7 million colours 16.7 million colours Both phones have the same color depth.
Contrast Ratio 1500:1 -
HDR - Yes Samsung Galaxy S21 5G has HDR.
HDR Technology - HDR10+
Display Enhancement Technology - Eye Comfort Shield
Display Refresh Rate - 120 Hz
Display Features Night Display, Sunlight Display, Reading mode, Colour temperature adjustment AOD(Always On Display), Video Wallpaper
Display Protection (Screen Protector) - Corning Gorilla Glass Victus (scratch resistant glass)
PROCESSOR Xiaomi MI Max 3 Samsung Galaxy S21 5G
Processor Type (CPU) Qualcomm Snapdragon 636 Qualcomm Snapdragon 888
Clock Speed 1.8 GHz 2.84 GHz Samsung Galaxy S21 5G has higher clock speed than Xiaomi MI Max 3.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes - Xiaomi MI Max 3 has 64-bit architecture.
Graphics System (GPU) Qualcomm ADRENO 509 -
MEMORY Xiaomi MI Max 3 Samsung Galaxy S21 5G
RAM LPDDR4X SDRAM - 4 GB LPDDR5 SDRAM - 8 GB Samsung Galaxy S21 5G has more RAM than Xiaomi MI Max 3.
Internal Memory Size (Storage Capacity) 64 GB 128 GB Samsung Galaxy S21 5G has more internal memory than Xiaomi MI Max 3.
User Memory - 101.2 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 256 GB -
CAMERA Xiaomi MI Max 3 Samsung Galaxy S21 5G
MAIN CAMERA
Number of Main Cameras 2 3
Sensor Resolution 12 Megapixel 12 Megapixel Both phones have the same camera resolution.
Sensor Size - 1/1.76"
Lens Type - Wide-angle lens
Lens Aperture F/1.9 F/1.8 Samsung Galaxy S21 5G has better lens aperture than Xiaomi MI Max 3.
Field of View (FoV) - 79 degree(s)
Pixel Size - 1.8 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Samsung Galaxy S21 5G has optical stabilisation.
Focus Adjustment Automatic Automatic
Laser Auto Focus - Yes
Optical Zoom - 3x
Digital Zoom - 30x
Self-Timer Delay - Yes
Special Effects HDR Face retouch, Grid Line
HDR Mode - Auto HDR mode
Camera Modes Burst mode, Panorama, AI portrait mode 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, Portrait, Night, Motion Photo, Mountain, Single Take, Pro Video, Portrait video, Director's View
Face Recognition (Face ID) Face recognition - Xiaomi MI Max 3 has face detection.
Light Source Dual LED flash High CRI LED flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps 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 (8K) at 24 fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 60 fps
Camera Features (Functions) Dual Pixel Autofocus technology, AI scene detection Playback zoom, Motion photo, blink detection, QR-code scanner, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, Scene Optimiser, Lens smudge, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Super steady, Super Speed Dual Pixel AF, Quick Measure, Zoom-In Mic, HEIF image capture, 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, AR Doodle, HEVC (High Efficiency Video coding) support, Microphone Control (Pro Video only)
SECOND CAMERA
Sensor Resolution (2nd Camera) 5 Megapixel 12 Megapixel Samsung Galaxy S21 5G has better second camera resolution than Xiaomi MI Max 3.
Lens Type (2nd Camera) - Ultra wide-angle lens
Lens Aperture (2nd Camera) - F/2.2
Field of View (2nd Camera) - 120 degree(s)
Pixel Size (2nd Camera) - 1.4 μm
THIRD CAMERA
Sensor Resolution (3rd Camera) - 64 Megapixel
Sensor Size (3rd Camera) - 1/1.72"
Lens Type (3rd Camera) - Telephoto lens
Lens Aperture (3rd Camera) - F/2.0
Field of View (3rd Camera) - 76 degree(s)
Pixel Size (3rd Camera) - 0.8 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Samsung Galaxy S21 5G has optical stabilisation of the third camera.
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 8 Megapixel 10 Megapixel Samsung Galaxy S21 5G has better front camera resolution than Xiaomi MI Max 3.
Lens Aperture (Front) F/2.0 F/2.2 Xiaomi MI Max 3 has better front lens aperture than Xiaomi MI Max 3.
Field of View (Front) - 80 degree(s)
Pixel Size (Front) - 1.22 μm
Focus Adjustment - Automatic
Camera Modes (Front) AI portrait mode, AI Beautify -
Face Recognition (Face ID) Face detection - Xiaomi MI Max 3 has face detection.
Camera Features (Front) - Dual Pixel AF
BATTERY AND CHARGING Xiaomi MI Max 3 Samsung Galaxy S21 5G
Battery Capacity (Battery Size) 5500 mAh 4000 mAh Xiaomi MI Max 3 has larger battery capacity than Samsung Galaxy S21 5G.
Fast Charging Technology Qualcomm Quick Charge 3.0 Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Power Delivery 3.0 Both phones have fast charging technology.
Wireless Charging - Yes Samsung Galaxy S21 5G can be charged wirelessly.
Wireless Charging Standards - WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare
Standby Time 474 hours -
Talk Time - 1800 minutes
Run Time Details Playback (video): up to 17 hrs
Gaming: up to 10 hrs
Playback (audio): up to 233 hrs
Standby: up to 474 hrs
Talk (LTE): up to 1800 min
Active online usage (LTE): up to 14 hrs
Active online usage (Wi-Fi): up to 15 hrs
Playback (wireless video): up to 19 hrs
Playback (wireless audio): up to 72 hrs
CELLULAR Xiaomi MI Max 3 Samsung Galaxy S21 5G
Technology WCDMA (UMTS) / GSM CDMA2000 1X / GSM / WCDMA (UMTS)
Mobile Broadband Generation 4G 5G Samsung Galaxy S21 5G has more advanced generation mobile network.
Operating System Android 8.1 Oreo Android 11
User Interface MIUI 10 -
Intelligent Assistant - Bixby
Payment Technology - Samsung Pay
Navigation GPS, A-GPS, GLONASS, BeiDou GPS, GLONASS, Galileo
COMMUNICATIONS Xiaomi MI Max 3 Samsung Galaxy S21 5G
Data Transmission GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, VoLTE FDD-LTE, TDD-LTE, 5G NR FR1, 5G NR FR2
2G Band - 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X, 1900 CDMA2000 1X
3G UMTS Band Band 1, Band 2, Band 5, Band 8 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 850, 900 2100, 1900, 1700, 850, 900
4G LTE Band Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 34, Band 38, Band 39, Band 40, Band 41 Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 13, Band 14, Band 18, Band 19, Band 20, Band 25, Band 26, Band 28, Band 30, Band 38, Band 39, Band 40, Band 41, Band 46, Band 48, Band 66, Band 71
4G LTE Frequency FDD 2100, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 700a, FDD 700c, FDD 700 PS, FDD 800 lower, FDD 800 upper, FDD 800 DD, FDD 1900+, FDD 850+, FDD 700 APT, FDD 2300 WCS, TDD 2600, TDD 1900, TDD 2300, TDD 2500, TDD 5150, TDD 3600, FDD 1700 - 2110 AWS-3, FDD 600
5G NR Band - N41, n71, n260, n261
5G NR Frequency - TDD TD 2500, FDD 600, TDD 39GHz, TDD 28GHz
Wireless Interface Infrared (IrDA), IEEE 802.11a/b/g/n/ac IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 5.0 Bluetooth 5.0
NFC - Yes Samsung Galaxy S21 5G has NFC reader for mobile payments.
Messaging Services SMS, MMS -
MEDIA Xiaomi MI Max 3 Samsung Galaxy S21 5G
Supported Digital Audio Standards WAV, AAC, PCM, AMR, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), DSD, AMR-WB, AMR-NB WAV, AAC, PCM, AMR, MP3, FLAC, XMF, OGG, MIDI, APE (Monkey's Audio), M4A, DSF, MXMF, OGA, 3GA, AWB, IMY, RTTTL, RTX, OTA, DFF, MID, DSD64, DSD128
Supported Digital Video Standards MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, H.265, MPEG4-ASP MKV, FLV, AVI, 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
FEATURES Xiaomi MI Max 3 Samsung Galaxy S21 5G
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, digital compass, gyro sensor, hall sensor Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor
Security Devices Fingerprint reader Fingerprint reader (under display), face recognition
Additional Phone Features Face Unlock, infrared remote control, Split Screen MIMO technology, Screen Write, notification flashlight, Smart Select, Fast Charging, Samsung KNOX, Smart View, Live message, Screen off memo, Samsung DeX support, Bixby Vision, TalkBack, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, Bixby key, Bluetooth Scalable Codec, Samsung Knox Vault, Private Share function, Enhanced Game Booster, Air Command
OTHERS Xiaomi MI Max 3 Samsung Galaxy S21 5G
Included Accessories Power adapter, SIM card removal tool, USB-C cable SIM card removal tool, USB-C to USB-C cable
Compliant Standards - VDE, IP68, HAC (Hearing Aid Compatible), SGS Eye Care Display Certification
Max Depth of Water Resistance - 1.5 m
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