UMIDIGI One Max vs. Samsung Galaxy S21 Ultra 5G

Phone Comparison, Reviews and Tests

Detailed comparison and review of UMIDIGI One Max and Samsung Galaxy S21 Ultra 5G. With our comprehensive overview, you can simply compare sizes, functions, but also other key features of both phones and easily decide which one is the right choice for you. Our goal is to help you identify the main differences between products and find the phone that best fits your needs and expectations.

Phone Specifications Comparison

UMIDIGI One Max vs. Samsung Galaxy S21 Ultra 5G Comparison Chart
DESIGN AND DIMENSIONS UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Product Type Smartphone Smartphone
Manufacturer Model Number - SM-G998B/DS
Form Factor Touch Touch
Height 156.8 mm 161.5 mm Samsung Galaxy S21 Ultra 5G has greater height than UMIDIGI One Max.
Width 75.6 mm 75.6 mm Both phones are the same width
Depth 8.35 mm 8.9 mm UMIDIGI One Max is narrower than UMIDIGI One Max.
Weight 205 g 227 g UMIDIGI One Max is lighter than UMIDIGI One Max.
Body Colour Twilight Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium
Body Material Tempered glass, aluminium frame -
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)
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 UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Display Type LCD display OLED display
Display Technology - Infinity-O Dynamic AMOLED 2X
Screen Size (Display Size) 6.3" 6.8" Samsung Galaxy S21 Ultra 5G has larger screen size than UMIDIGI One Max.
Screen Resolution (Display Resolution) 1520 x 720 pixels 3200 x 1440 pixels Samsung Galaxy S21 Ultra 5G has better screen resolution than UMIDIGI One Max.
Display Format - QHD+
Pixel Density 271 ppi 515 ppi Samsung Galaxy S21 Ultra 5G has better pixel density than UMIDIGI One Max.
Aspect Ratio 19:9 -
Colour Depth - 16.7 million colours
HDR - Yes Samsung Galaxy S21 Ultra 5G has HDR.
HDR Technology - HDR10+
Display Enhancement Technology - Eye Comfort Shield
Display Refresh Rate - 120 Hz
Display Features In-Cell Display Technology, Reading mode, Colour temperature adjustment Edge Screen, AOD(Always On Display)
Display Protection (Screen Protector) - Corning Gorilla Glass Victus (scratch resistant glass)
PROCESSOR UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Processor Type (CPU) MediaTek Helio P23 Samsung Exynos 2100
Clock Speed 2 GHz 2.9 GHz Samsung Galaxy S21 Ultra 5G has higher clock speed than UMIDIGI One Max.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
64-bit Architecture Yes - UMIDIGI One Max has 64-bit architecture.
Graphics System (GPU) Mali-G71 MP2 Mali-G78 MP14
MEMORY UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
RAM LPDDR4X SDRAM - 4 GB LPDDR5 SDRAM - 12 GB Samsung Galaxy S21 Ultra 5G has more RAM than UMIDIGI One Max.
Internal Memory Size (Storage Capacity) 128 GB 128 GB Both phones have the same internal memory capacity.
User Memory - 101.7 GB
Supported Flash Memory Cards (Expandable Memory) microSDHC, microSDXC - up to 256 GB -
CAMERA UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
MAIN CAMERA
Number of Main Cameras 2 4
Sensor Resolution 12 Megapixel 12 Megapixel Both phones have the same camera resolution.
Sensor Name Omnivision OV12870 sensor -
Lens Type - Ultra wide-angle lens
Lens Aperture F/2.0 F/2.2 UMIDIGI One Max has better lens aperture than UMIDIGI One Max.
Lens Construction 6-element -
Field of View (FoV) - 120 degree(s)
Pixel Size - 1.4 μm
Optical Image Stabiliser (OIS) - Optical Image Stabiliser (OIS) Samsung Galaxy S21 Ultra 5G has optical stabilisation.
Focus Adjustment - Automatic
Laser Auto Focus - Yes
Optical Zoom - 3x
Digital Zoom - 100x
Self-Timer Delay - Yes
Special Effects - Face retouch, Grid Line
HDR Mode - Auto HDR mode
Camera Modes Panorama 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
Face Recognition (Face ID) Face recognition - UMIDIGI One Max 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 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
Camera Features (Functions) Real-time photo filters 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
SECOND CAMERA
Sensor Resolution (2nd Camera) 5 Megapixel 108 Megapixel Samsung Galaxy S21 Ultra 5G has better second camera resolution than UMIDIGI One Max.
Sensor Size (2nd Camera) - 1/1.33"
Lens Type (2nd Camera) - Wide-angle lens
Lens Aperture (2nd Camera) - F/1.8
Field of View (2nd Camera) - 83 degree(s)
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
Lens Type (3rd Camera) - Telephoto lens
Lens Aperture (3rd Camera) - F/2.4
Field of View (3rd Camera) - 35 degree(s)
Pixel Size (3rd Camera) - 1.22 μm
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) 16 Megapixel 40 Megapixels Samsung Galaxy S21 Ultra 5G has better front camera resolution than UMIDIGI One Max.
Sensor Name (Front) Samsung S5K3P3 -
Lens Aperture (Front) F/2.0 F/2.2 UMIDIGI One Max has better front lens aperture than UMIDIGI One Max.
Lens Element Qty (Front) 5-element -
Field of View (Front) - 80 degree(s)
Pixel Size (Front) - 0.7 μm
Focus Adjustment - Automatic
Face Recognition (Face ID) Face recognition - UMIDIGI One Max has face detection.
Camera Features (Front) Selfie countdown Phase Detect Auto-Focus (PDAF)
BATTERY AND CHARGING UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Battery Capacity (Battery Size) 4150 mAh 5000 mAh Samsung Galaxy S21 Ultra 5G has larger battery capacity than UMIDIGI One Max.
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.
Wireless Charging Yes Yes Both phones can be charged wirelessly.
Wireless Charging Standards Qi, Fast Wireless Charging 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
CELLULAR UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Technology CDMA2000 1X / GSM / WCDMA (UMTS) WCDMA (UMTS) / GSM
Mobile Broadband Generation 4G 5G Samsung Galaxy S21 Ultra 5G has more advanced generation mobile network.
Operating System Android 8.1.0 Oreo Android 11
Intelligent Assistant - Bixby
Payment Technology - Samsung Pay
Navigation GPS, GLONASS GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Data Transmission GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE FDD-LTE, TDD-LTE, 5G NR FR1
2G Band 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X, 1900 CDMA2000 1X 850 GSM, 900 GSM, 1800 GSM, 1900 GSM
3G UMTS Band Band 1, Band 2, Band 4, Band 5, Band 6, Band 8, Band 19 Band 1, Band 2, Band 4, Band 5, Band 8
3G UMTS Frequency 2100, 1900, 1700, 850, 800, 900, 800 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 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 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
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, 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 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
5G NR Band - N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, n77, n78, 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
Wireless Interface IEEE 802.11a/b/g/n IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 4.1 Bluetooth 5.2
Bluetooth Profiles HID -
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Messaging Services SMS, MMS -
MEDIA UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Supported Digital Audio Standards WAV, AAC, PCM, MP3, AAC +, eAAC+, APE (Monkey's Audio), AMR-WB, AMR-NB 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
Supported Digital Video Standards MKV, XviD, MPEG-4, M4V, ASP, H.264 AVC Main Profile (MP), H.264 AVC Baseline Profile(BP) 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
FEATURES UMIDIGI One Max Samsung Galaxy S21 Ultra 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, gyro sensor, geomagnetic sensor, L-sensor, P-sensor Accelerometer, ambient light sensor, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor
Security Devices Face recognition, fingerprint reader (side) Fingerprint reader (under display), face recognition
Additional Phone Features Dual microphones 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
OTHERS UMIDIGI One Max Samsung Galaxy S21 Ultra 5G
Included Accessories Power adapter, SIM card removal tool, USB-C cable, pre-installed screen protector, protective case SIM card removal tool, USB-C to USB-C cable
Compliant Standards - IP68, HAC (Hearing Aid Compatible)
Max Depth of Water Resistance - 1.5 m
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