Samsung Galaxy Z Fold2 5G vs. Samsung Galaxy S21 Ultra 5G

Phone Comparison, Reviews and Tests

In depth comparison and review of Samsung Galaxy Z Fold2 5G and Samsung Galaxy S21 Ultra 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

Samsung Galaxy Z Fold2 5G vs. Samsung Galaxy S21 Ultra 5G Comparison Chart
DESIGN AND DIMENSIONS Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Product Type Smartphone Smartphone
Manufacturer Model Number SM-F916B SM-G998B/DS
Form Factor Folder - touch screen, dual screen Touch
Height 159.2 mm 161.5 mm Samsung Galaxy S21 Ultra 5G has greater height than Samsung Galaxy Z Fold2 5G.
Width 68 mm 75.6 mm Samsung Galaxy S21 Ultra 5G has greater width than Samsung Galaxy Z Fold2 5G.
Depth 16.8 mm 8.9 mm Samsung Galaxy S21 Ultra 5G is narrower than Samsung Galaxy Z Fold2 5G.
Weight 282 g 227 g Samsung Galaxy S21 Ultra 5G is lighter than Samsung Galaxy Z Fold2 5G.
Dimensions Details Folded - 68 mm x 16.8 mm x 159.2 mm
Unfolded - 128.2 mm x 6.9 mm x 159.2 mm
-
Body Colour Thom Browne Gray | Mystic black, metallic blue hinge | Mystic bronze, metallic blue hinge | Mystic black, metallic gold hinge | Mystic bronze, metallic gold hinge | Mystic black, metallic red hinge | Mystic bronze, metallic red hinge | Mystic black, metallic silver hinge | Mystic bronze, metallic silver hinge | Mystic black | Mystic bronze Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium
Body Material Gorilla glass 6 -
Protection - Dustproof, splashproof, water-resistant
Waterproof (Water-resistant) - Yes Samsung Galaxy S21 Ultra 5G is waterproof.
IP rating - IP68
SAR Value 0.291 W/kg (head, LTE), 0.859 W/kg (head, 5G), 1.453 W/kg (body) 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, Electronic SIM card (e-SIM)
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Display Type OLED display OLED display
Display Technology Infinity Flex Dynamic AMOLED 2X Infinity-O Dynamic AMOLED 2X
Foldable Display Yes -
Display Design Inward folding -
Screen Size (Display Size) 7.6" 6.8" Samsung Galaxy Z Fold2 5G has larger screen size than Samsung Galaxy S21 Ultra 5G.
Screen Resolution (Display Resolution) 2208 x 1768 pixels 3200 x 1440 pixels Samsung Galaxy S21 Ultra 5G has better screen resolution than Samsung Galaxy Z Fold2 5G.
Display Format QXGA+ QHD+
Pixel Density 373 ppi 515 ppi Samsung Galaxy S21 Ultra 5G has better pixel density than Samsung Galaxy Z Fold2 5G.
Aspect Ratio 22.5:18 -
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
Display Refresh Rate 120 Hz 120 Hz Both phones have the same refresh rate.
Display Features Flex screen Edge Screen, AOD(Always On Display)
Display Protection (Screen Protector) Samsung Ultra Thin Glass, Corning Gorilla Glass Victus (scratch resistant glass) Corning Gorilla Glass Victus (scratch resistant glass)
SECOND DISPLAY
Second Display Type OLED display - colour -
Second Display Screen Size 6.2" -
Second Display Resolution 2260 x 816 pixels -
Second Display Colour Depth 16.7 million colours -
UNFOLDED DISPLAY
Unfolded Display Screen Size 7.6 in -
Unfolded Display Resolution 2208 x 1768 pixels -
PROCESSOR Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Processor Type (CPU) - Samsung Exynos 2100
Clock Speed 3.09 GHz 2.9 GHz Samsung Galaxy Z Fold2 5G has higher clock speed than Samsung Galaxy S21 Ultra 5G.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
Graphics System (GPU) - Mali-G78 MP14
MEMORY Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
RAM 12 GB LPDDR5 SDRAM - 12 GB Both phones have the same RAM size.
Internal Memory Size (Storage Capacity) 256 GB 128 GB Samsung Galaxy Z Fold2 5G has more internal memory than Samsung Galaxy S21 Ultra 5G.
User Memory 220.6 GB 101.7 GB
Memory Interface UFS 3.1 -
CAMERA Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
MAIN CAMERA
Number of Main Cameras 3 4
Sensor Resolution 12 Megapixel 12 Megapixel Both phones have the same camera resolution.
Lens Type Ultra wide-angle lens Ultra wide-angle lens
Lens Aperture F/2.2 F/2.2 Both phones have the same camera lens aperture.
Field of View (FoV) 123 degree(s) 120 degree(s) Samsung Galaxy Z Fold2 5G has larger lens field of view than Samsung Galaxy S21 Ultra 5G.
Pixel Size 1.12 μm 1.4 μm Samsung Galaxy S21 Ultra 5G has larger camera pixel size than Samsung Galaxy Z Fold2 5G.
Optical Image Stabiliser (OIS) Dual OIS (Optical Image Stabilisation) Optical Image Stabiliser (OIS) Both phones have optical image stabilization.
Focus Adjustment Automatic Automatic
Laser Auto Focus - Yes
Optical Zoom 2x 3x Samsung Galaxy S21 Ultra 5G has better optical zoom than Samsung Galaxy Z Fold2 5G.
Digital Zoom 10x 100x Samsung Galaxy S21 Ultra 5G has better digital zoom than Samsung Galaxy Z Fold2 5G.
Self-Timer Delay Yes Yes
Special Effects HDR, Grid Line, Motion photos Face retouch, Grid Line
HDR Mode - Auto HDR mode
Camera Modes Panorama, Slow motion mode, Pro mode, selfie mode, HYPERLAPSE, Live Focus mode, 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, Live focus video, Night, Mountain, Single Take, Pro Video, NIGHT HYPERLAPSE 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 detection - Samsung Galaxy Z Fold2 5G has face detection.
Light Source High CRI LED flash High CRI 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 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) Quick Launch, Playback zoom, blink detection, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, location tags, Hyperlapse video support 1080p, Scene Optimiser, Lens smudge, Full view, Flaw detection, Shot suggestions, blur detection, HDR10+ recording, Floating shutter button, Super steady, Zoom-In Mic, AR Doodle, Microphone Control, HEVC (High Efficiency Video coding), Dual preview, Auto framing, Flex mode, Capture View mode 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) 12 Megapixel 108 Megapixel Samsung Galaxy S21 Ultra 5G has better second camera resolution than Samsung Galaxy Z Fold2 5G.
Sensor Size (2nd Camera) - 1/1.33"
Lens Type (2nd Camera) Wide-angle lens Wide-angle lens
Lens Aperture (2nd Camera) F/1.8 F/1.8 Both phones have the same second camera lens aperture.
Field of View (2nd Camera) 83 degree(s) 83 degree(s) Both phones have the same second camera lens field of view.
Pixel Size (2nd Camera) 1.8 μm 0.8 μm Samsung Galaxy Z Fold2 5G has larger second camera pixel size than Samsung Galaxy S21 Ultra 5G.
Optical Image Stabiliser (OIS) Optical Image Stabiliser (OIS) - Samsung Galaxy Z Fold2 5G has optical stabilisation of the second camera.
Camera Features (2nd Camera) Super Speed Dual Pixel AF Phase Detect Auto-Focus (PDAF), OIS (Optical Image Stabilisation)
THIRD CAMERA
Sensor Resolution (3rd Camera) 12 Megapixel 10 Megapixel Samsung Galaxy Z Fold2 5G has higher resolution third camera than Samsung Galaxy S21 Ultra 5G.
Lens Type (3rd Camera) Telephoto lens 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) 45 degree(s) 35 degree(s) Samsung Galaxy Z Fold2 5G has larger third camera lens field of view than Samsung Galaxy S21 Ultra 5G.
Pixel Size (3rd Camera) 1 μm 1.22 μm Samsung Galaxy S21 Ultra 5G has larger third camera pixel size than Samsung Galaxy Z Fold2 5G.
Optical Image Stabiliser (OIS) Optical Image Stabiliser (OIS) - Samsung Galaxy Z Fold2 5G has optical stabilisation of the third camera.
Camera Features (3rd Camera) Phase Detect Auto-Focus (PDAF) 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 2 1
Sensor Resolution (Front) 10 Megapixel 40 Megapixels Samsung Galaxy S21 Ultra 5G has better front camera resolution than Samsung Galaxy Z Fold2 5G.
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) 80 degree(s) Both phones have the same front lens field of view.
Pixel Size (Front) 1.22 μm 0.7 μm Samsung Galaxy Z Fold2 5G has larger front camera pixel size than Samsung Galaxy S21 Ultra 5G.
Focus Adjustment - Automatic
Special Effects (Front) HDR, Grid Line -
Camera Features (Front) - Phase Detect Auto-Focus (PDAF)
SECOND FRONT CAMERA
Sensor Resolution (2nd Front) 10 Megapixel -
Lens Aperture (2nd Front) F/2.2 -
Field of View (2nd Front) 80 degree(s) -
Pixel Size (2nd Front) 1.22 μm -
BATTERY AND CHARGING Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Battery Capacity (Battery Size) 4500 mAh 5000 mAh Samsung Galaxy S21 Ultra 5G has larger battery capacity than Samsung Galaxy Z Fold2 5G.
Fast Charging Technology Qualcomm Quick Charge 2.0, Samsung Super Fast Charging Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 Both phones have fast charging technology.
Wireless Charging Yes Yes Both phones can be charged wirelessly.
Wireless Charging Standards WPC, PMA, Qi, Fast Wireless Charging, Wireless PowerShare WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare
Talk Time 1860 minutes 2460 minutes Samsung Galaxy S21 Ultra 5G has longer battery life when making calls than Samsung Galaxy Z Fold2 5G.
Run Time Details Active online usage (LTE): up to 11 hrs
Active online usage (Wi-Fi): up to 11 hrs
Playback (wireless video): up to 18 hrs
Playback (wireless audio): up to 83 hrs
Talk (4G): up to 1860 min
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 Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Technology WCDMA (UMTS) / GSM WCDMA (UMTS) / GSM
Mobile Broadband Generation 5G 5G Both phones have the same mobile network generation.
Operating System Android 10 Android 11
Intelligent Assistant Bixby Bixby
Payment Technology Samsung Pay Samsung Pay
Navigation GPS, GLONASS, BeiDou, Galileo GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Data Transmission FDD-LTE, TDD-LTE, LAA, 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 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, 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, n28, n41, n77, n78, n40 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 700APT, TDD TD 2500, 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 3700, TDD TD 3500, TDD 2300
Wireless Interface IEEE 802.11a/b/g/n/ac, IEEE 802.11a/b/g/n/ac/ax IEEE 802.11a/b/g/n/ac/ax
Bluetooth Bluetooth 5.0 LE Bluetooth 5.2
NFC Yes Yes Both phones have an NFC reader for mobile payments.
Ultra-Wideband (UWB) Yes - Samsung Galaxy Z Fold2 5G has UWB wireless technology.
Messaging Services SMS, MMS -
MEDIA Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Supported Digital Audio Standards WAV, WMA, 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 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, FLV, AVI, WMV, ASF, 3GP, M4V, WebM, 3G2, MP4 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 Digital Plus sound, Dolby Atmos sound technology, Surround sound, stereo speakers tuned by AKG, Dolby Digital sound
FEATURES Samsung Galaxy Z Fold2 5G 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, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light 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 Multitasking, MU-MIMO technology, Fast Charging, Samsung KNOX, High AOP Mic, Smart View, Samsung DeX support, Bixby Vision, Secure Folder function, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, dual battery, Flex mode, Multi Active Window, Bluetooth Scalable Codec, Hinge CAM technology, App Pair, Split Screen Capture 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 Samsung Galaxy Z Fold2 5G Samsung Galaxy S21 Ultra 5G
Included Accessories Power adapter, SIM card removal tool, USB-C cable, protective case, Samsung Galaxy Buds Live SIM card removal tool, USB-C to USB-C cable
Compliant Standards VDE, SGS Eye Care Display Certification IP68, HAC (Hearing Aid Compatible)
Max Depth of Water Resistance - 1.5 m
Other projects: