Samsung Galaxy S21 Ultra 5G vs. OnePlus 9

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy S21 Ultra 5G and OnePlus 9. 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

Samsung Galaxy S21 Ultra 5G vs. OnePlus 9 Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy S21 Ultra 5G OnePlus 9
Product Type Smartphone Smartphone
Manufacturer Model Number SM-G998B/DS -
Form Factor Touch Touch
Height 161.5 mm 160 mm Samsung Galaxy S21 Ultra 5G has greater height than OnePlus 9.
Width 75.6 mm 74.2 mm Samsung Galaxy S21 Ultra 5G has greater width than OnePlus 9.
Depth 8.9 mm 8.7 mm OnePlus 9 is narrower than Samsung Galaxy S21 Ultra 5G.
Weight 227 g 192 g OnePlus 9 is lighter than Samsung Galaxy S21 Ultra 5G.
Body Colour Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium Astral black | Arctic sky
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 USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM, Electronic SIM card (e-SIM) Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy S21 Ultra 5G OnePlus 9
Display Type OLED display OLED display
Display Technology Infinity-O Dynamic AMOLED 2X Fluid Amoled
Screen Size (Display Size) 6.8" 6.55" Samsung Galaxy S21 Ultra 5G has larger screen size than OnePlus 9.
Screen Resolution (Display Resolution) 3200 x 1440 pixels 2400 x 1080 pixels Samsung Galaxy S21 Ultra 5G has better screen resolution than OnePlus 9.
Display Format QHD+ Full HD+
Pixel Density 515 ppi 402 ppi Samsung Galaxy S21 Ultra 5G has better pixel density than OnePlus 9.
Aspect Ratio - 20:9
Max Brightness - 1100 cd/m²
Colour Depth 16.7 million colours 16.7 million colours Both phones have the same color depth.
HDR Yes Yes Both phones have HDR.
HDR Technology HDR10+ HDR10+
Display Enhancement Technology Eye Comfort Shield Vibrant Color Effect
Display Refresh Rate 120 Hz 120 Hz Both phones have the same refresh rate.
Display Features Edge Screen, AOD(Always On Display) Always-on display, Reading mode, night mode, Wide colour display (P3), sRGB support
Display Protection (Screen Protector) Corning Gorilla Glass Victus (scratch resistant glass) Corning Gorilla Glass (scratch resistant glass)
PROCESSOR Samsung Galaxy S21 Ultra 5G OnePlus 9
Processor Type (CPU) Samsung Exynos 2100 Qualcomm Snapdragon 888
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 660
MEMORY Samsung Galaxy S21 Ultra 5G OnePlus 9
RAM LPDDR5 SDRAM - 12 GB LPDDR5 SDRAM - 8 GB Samsung Galaxy S21 Ultra 5G has more RAM than OnePlus 9.
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 OnePlus 9
MAIN CAMERA
Number of Main Cameras 4 3
Sensor Resolution 12 Megapixel 48 Megapixel OnePlus 9 has better camera resolution than Samsung Galaxy S21 Ultra 5G.
Sensor Size - 1/1.43"
Sensor Name - Sony Exmor RS IMX689 sensor
Lens Type Ultra wide-angle lens -
Lens Aperture F/2.2 F/1.8 OnePlus 9 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 1.12 μm Samsung Galaxy S21 Ultra 5G has larger camera pixel size than OnePlus 9.
Optical Image Stabiliser (OIS) Optical Image Stabiliser (OIS) - Samsung Galaxy S21 Ultra 5G has optical stabilisation.
Focus Adjustment Automatic Automatic
Laser Auto Focus Yes Yes
Minimum Focal Length (Focal Distance) - 23 mm
Optical Zoom 3x -
Digital Zoom 100x -
Self-Timer Delay Yes -
Special Effects Face retouch, Grid Line HDR
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 Panorama, Time-lapse mode, Pro mode, HYPERLAPSE, Nightscape capture mode, Portrait, Filter mode, Super Macro, Portrait video, UltraShot HDR, Smart Scene Recognition, Tilt-shift mode, Focus Peaking, Cat/Dog Face Focus, Super Stable, Video Nightscape
Light Source High CRI LED flash Dual 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, 3840 x 2160 (4K) at 30 fps, 3840 x 2160 (4K) at 60 fps, Super slow motion video 1920 x 1080 (1080p) at 240 fps, Super slow motion video 1280 x 720 (720p) at 480 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 Tracking Focus, Phase Detect Auto-Focus (PDAF), Continuous Auto Focus (CAF), RAW image capture, Dual Native ISO, 2x2 On-Chip Lens (OCL), Hasselblad Camera, Natural Color Calibration, 12-bit RAW
SECOND CAMERA
Sensor Resolution (2nd Camera) 108 Megapixel 50 Megapixel Samsung Galaxy S21 Ultra 5G has better second camera resolution than OnePlus 9.
Sensor Size (2nd Camera) 1/1.33" 1/1.56" OnePlus 9 has better second camera sensor size than Samsung Galaxy S21 Ultra 5G.
Sensor Name (2nd Camera) - Sony Exmor RS IMX766 sensor
Lens Type (2nd Camera) Wide-angle lens Ultra wide-angle lens
Lens Aperture (2nd Camera) F/1.8 F/2.2 Samsung Galaxy S21 Ultra 5G has better second camera lens aperture than Samsung Galaxy S21 Ultra 5G.
Lens Element Qty (2nd Camera) - 7-element
Field of View (2nd Camera) 83 degree(s) 119 degree(s) OnePlus 9 has larger second camera lens field of view than Samsung Galaxy S21 Ultra 5G.
Pixel Size (2nd Camera) 0.8 μm -
Minimum Focal Length (2nd Camera) - 14 mm
Camera Features (2nd Camera) Phase Detect Auto-Focus (PDAF), OIS (Optical Image Stabilisation) 2x2 On-Chip Lens (OCL), Freeform Lens
THIRD CAMERA
Sensor Resolution (3rd Camera) 10 Megapixel 2 Megapixel Samsung Galaxy S21 Ultra 5G has higher resolution third camera than OnePlus 9.
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.
Lens Element Qty (3rd Camera) - 3-element
Field of View (3rd Camera) 35 degree(s) -
Pixel Size (3rd Camera) 1.22 μm -
Camera Functions (3rd Camera) - Monochrome
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 16 Megapixel Samsung Galaxy S21 Ultra 5G has better front camera resolution than OnePlus 9.
Sensor Name (Front) - Sony Exmor RX IMX471 sensor
Lens Aperture (Front) F/2.2 F/2.4 Samsung Galaxy S21 Ultra 5G has better front lens aperture than Samsung Galaxy S21 Ultra 5G.
Field of View (Front) 80 degree(s) -
Pixel Size (Front) 0.7 μm 1 μm OnePlus 9 has larger front camera pixel size than Samsung Galaxy S21 Ultra 5G.
Focus Adjustment Automatic Focus free
Special Effects (Front) - HDR, face retouch
Camera Modes (Front) - Time-lapse mode
Light Source (Front) - Display flash
Video Resolutions (Front) - 1920 x 1080 (1080p) at 30 fps
Camera Features (Front) Phase Detect Auto-Focus (PDAF) Electronic Image Stabiliser (EIS)
BATTERY AND CHARGING Samsung Galaxy S21 Ultra 5G OnePlus 9
Battery Capacity (Battery Size) 5000 mAh 4500 mAh Samsung Galaxy S21 Ultra 5G has larger battery capacity than OnePlus 9.
Fast Charging Technology Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 Qualcomm Quick Charge, Warp Charge 65T technology Both phones have fast charging technology.
Recharge Time (Charging Time) - 29 min
Wireless Charging Yes Yes Both phones can be charged wirelessly.
Wireless Charging Standards WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare Qi
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 Samsung Galaxy S21 Ultra 5G OnePlus 9
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 5G 5G Both phones have the same mobile network generation.
Operating System Android 11 OxygenOS (based on Android 11)
Intelligent Assistant Bixby -
Payment Technology Samsung Pay -
Navigation GPS, GLONASS, BeiDou, Galileo GPS, A-GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Samsung Galaxy S21 Ultra 5G OnePlus 9
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, Band 9, Band 19
3G UMTS Frequency 2100, 1900, 1700, 850, 900 2100, 1900, 1700, 850, 900, 1700, 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 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, 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 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 N1, n3, n5, n7, n8, n20, n28, n38, n41, n66, 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 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 3500, TDD 2300
Wireless Interface IEEE 802.11a/b/g/n/ac/ax IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 5.2 Bluetooth 5.2
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Modem - Snapdragon X55 5G
MEDIA Samsung Galaxy S21 Ultra 5G OnePlus 9
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 WAV, WMA, AAC, MP3, FLAC, AC-3, AAC +, OGG, APE (Monkey's Audio), M4A, LDAC, IMY, EAC3, MID, AMR-WB, AMR-NB, EAC3-JOC, AC-4
Supported Digital Video Standards MKV, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 MKV, FLV, AVI, MOV, WMV, 3GP, TS, WebM, H.265 HEVC, MP4
Sound Enhancements Dolby Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound Qualcomm aptX audio, Qualcomm aptX HD audio, Dolby Atmos Surround Sound
FEATURES Samsung Galaxy S21 Ultra 5G OnePlus 9
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, ambient light sensor, proximity sensor, digital compass, gyro sensor, flicker sensor, sensor core
Security Devices Fingerprint reader (under display), face recognition Fingerprint reader (under display), 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 Noise Cancellation Technology, MIMO technology, Gesture Controls, OnePlus Switch, Alert Slider, dual stereo speakers, Zen mode 2.0, OnePlus Games
OTHERS Samsung Galaxy S21 Ultra 5G OnePlus 9
Included Accessories SIM card removal tool, USB-C to USB-C cable SIM card removal tool, sticker, screen protector, USB-C to USB-C cable, protective case, Warp Charge 65 power adapter
Compliant Standards IP68, HAC (Hearing Aid Compatible) SGS
Max Depth of Water Resistance 1.5 m -
Other projects: