Detailed comparison and review of Samsung Galaxy S21 Ultra 5G and Samsung Galaxy Z Fold3 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.
| DESIGN AND DIMENSIONS | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-G998B/DS | SM-F926B/DS | |
| Form Factor | Touch | Folder - touch screen, dual screen | |
| Height | 161.5 mm | 158.2 mm | Samsung Galaxy S21 Ultra 5G has greater height than Samsung Galaxy Z Fold3 5G. |
| Width | 75.6 mm | 67.1 mm | Samsung Galaxy S21 Ultra 5G has greater width than Samsung Galaxy Z Fold3 5G. |
| Depth | 8.9 mm | 16 mm | Samsung Galaxy S21 Ultra 5G is narrower than Samsung Galaxy S21 Ultra 5G. |
| Weight | 227 g | 271 g | Samsung Galaxy S21 Ultra 5G is lighter than Samsung Galaxy S21 Ultra 5G. |
| Dimensions Details | - | Folded - 67.1 mm x 16 mm x 158.2 mm Unfolded - 128.1 mm x 6.4 mm x 158.2 mm |
|
| Body Colour | Phantom silver | Phantom black | Phantom navy | Phantom brown | Phantom titanium | Phantom black | Phantom silver | Phantom Green | |
| Body Material | - | Aluminium, Corning Gorilla Glass Victus | |
| Protection | Dustproof, splashproof, water-resistant | Water-resistant | |
| Waterproof (Water-resistant) | Yes | Yes | Both phones are waterproof. |
| IP rating | IP68 | IPX8 | |
| Repairability Index | - | 7.8 (out of 10) | |
| SAR Value | 1.58 W/kg (body), 0.714 W/kg (head), 2.56 W/kg (limb) | 1.036 W/kg (head), 1.443 W/kg (body) | |
| 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 | Samsung Galaxy Z Fold3 5G |
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| Display Type | OLED display | OLED display | |
|---|---|---|---|
| Display Technology | Infinity-O Dynamic AMOLED 2X | Infinity Flex Dynamic AMOLED 2X | |
| Foldable Display | - | Yes | |
| Display Design | - | Inward folding | |
| Screen Size (Display Size) | 6.8" | 7.6" | Samsung Galaxy Z Fold3 5G has larger screen size than Samsung Galaxy S21 Ultra 5G. |
| Screen Resolution (Display Resolution) | 3200 x 1440 pixels | 2208 x 1768 pixels | Samsung Galaxy S21 Ultra 5G has better screen resolution than Samsung Galaxy Z Fold3 5G. |
| Display Format | QHD+ | QXGA+ | |
| Pixel Density | 515 ppi | 374 ppi | Samsung Galaxy S21 Ultra 5G has better pixel density than Samsung Galaxy Z Fold3 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 | Edge Screen, AOD(Always On Display) | AOD(Always On Display), flex screen, Edge Lighting | |
| Display Protection (Screen Protector) | Corning Gorilla Glass Victus (scratch resistant glass) | Samsung Ultra Thin Glass |
| SECOND DISPLAY |
|---|
| Second Display Type | - | OLED display - colour | |
|---|---|---|---|
| Second Display Screen Size | - | 6.2" | |
| Second Display Resolution | - | 2268 x 832 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 S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| Processor Type (CPU) | Samsung Exynos 2100 | Qualcomm Snapdragon 888 5G | |
|---|---|---|---|
| Clock Speed | 2.9 GHz | 2.84 GHz | Samsung Galaxy S21 Ultra 5G has higher clock speed than Samsung Galaxy Z Fold3 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 S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| RAM | LPDDR5 SDRAM - 12 GB | 12 GB | Both phones have the same RAM size. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 256 GB | Samsung Galaxy Z Fold3 5G has more internal memory than Samsung Galaxy S21 Ultra 5G. |
| User Memory | 101.7 GB | 215.7 GB | |
| Memory Interface | - | UFS 3.1 |
| CAMERA | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| MAIN CAMERA |
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| Number of Main Cameras | 4 | 3 | |
|---|---|---|---|
| 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) | 120 degree(s) | 123 degree(s) | Samsung Galaxy Z Fold3 5G has larger lens field of view than Samsung Galaxy S21 Ultra 5G. |
| Pixel Size | 1.4 μm | 1.12 μm | Samsung Galaxy S21 Ultra 5G has larger camera pixel size than Samsung Galaxy Z Fold3 5G. |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | Dual OIS (Optical Image Stabilisation) | Both phones have optical image stabilization. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Optical Zoom | 3x | 2x | Samsung Galaxy S21 Ultra 5G has better optical zoom than Samsung Galaxy Z Fold3 5G. |
| Digital Zoom | 100x | 10x | Samsung Galaxy S21 Ultra 5G has better digital zoom than Samsung Galaxy Z Fold3 5G. |
| Self-Timer Delay | Yes | Yes | |
| Special Effects | Face retouch, Grid Line | Auto HDR, Grid Line, Motion photos | |
| 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, Slow motion mode, Pro mode, selfie 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, Mountain, Single Take, Pro Video, NIGHT HYPERLAPSE, Portrait video, Director's View | |
| Face Recognition (Face ID) | - | Face detection | Samsung Galaxy Z Fold3 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, 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, Super slow motion video 1280 x 720 (720p) at 960 fps, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Hyperlapse 4K video support at 30 fps, Super Steady 1080p video support at 30 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 | Playback zoom, blink detection, QR-code scanner, VDIS (Video Digital Image Stabilisation), Tracking AF, Video location tags, AR sticker, Scene Optimiser, Lens smudge, Flaw detection, Shot suggestions, AR Emoji, blur detection, HDR10+ recording, Super steady, Zoom-In Mic, HEIF image capture, AR Doodle, Microphone Control, HEVC (High Efficiency Video coding), Dual preview, Auto framing, Capture View mode, Corning Gorilla Glass DX (protective lens glass) |
| SECOND CAMERA |
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| Sensor Resolution (2nd Camera) | 108 Megapixel | 12 Megapixel | Samsung Galaxy S21 Ultra 5G has better second camera resolution than Samsung Galaxy Z Fold3 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) | 0.8 μm | 1.8 μm | Samsung Galaxy Z Fold3 5G has larger second camera pixel size than Samsung Galaxy S21 Ultra 5G. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy Z Fold3 5G has optical stabilisation of the second camera. |
| Camera Features (2nd Camera) | Phase Detect Auto-Focus (PDAF), OIS (Optical Image Stabilisation) | Dual Pixel AF |
| THIRD CAMERA |
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| Sensor Resolution (3rd Camera) | 10 Megapixel | 12 Megapixel | Samsung Galaxy Z Fold3 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) | 35 degree(s) | 45 degree(s) | Samsung Galaxy Z Fold3 5G has larger third camera lens field of view than Samsung Galaxy S21 Ultra 5G. |
| Pixel Size (3rd Camera) | 1.22 μm | 1 μm | Samsung Galaxy S21 Ultra 5G has larger third camera pixel size than Samsung Galaxy Z Fold3 5G. |
| Optical Image Stabiliser (OIS) | - | Optical Image Stabiliser (OIS) | Samsung Galaxy Z Fold3 5G has optical stabilisation of the third camera. |
| Camera Features (3rd Camera) | Dual Pixel AF | Phase Detect Auto-Focus (PDAF) |
| FOURTH CAMERA |
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| 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 | 2 | |
|---|---|---|---|
| Sensor Resolution (Front) | 40 Megapixels | 10 Megapixel | Samsung Galaxy S21 Ultra 5G has better front camera resolution than Samsung Galaxy Z Fold3 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) | 0.7 μm | 1.22 μm | Samsung Galaxy Z Fold3 5G has larger front camera pixel size than Samsung Galaxy S21 Ultra 5G. |
| Focus Adjustment | Automatic | - | |
| Special Effects (Front) | - | Auto HDR, Grid Line | |
| Camera Features (Front) | Phase Detect Auto-Focus (PDAF) | - |
| SECOND FRONT CAMERA |
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| Sensor Resolution (2nd Front) | - | 4 Megapixel | |
|---|---|---|---|
| Lens Aperture (2nd Front) | - | F/1.8 | |
| Field of View (2nd Front) | - | 80 degree(s) | |
| Pixel Size (2nd Front) | - | 2 μm |
| BATTERY AND CHARGING | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| Battery Capacity (Battery Size) | 5000 mAh | 4400 mAh | Samsung Galaxy S21 Ultra 5G has larger battery capacity than Samsung Galaxy Z Fold3 5G. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 2.0, Adaptive Fast Charging, Samsung Super Fast Charging, Power Delivery 3.0 | Qualcomm Quick Charge 2.0, Adaptive Fast Charging | Both phones have fast charging technology. |
| Wireless Charging | Yes | Yes | Both phones can be charged wirelessly. |
| Wireless Charging Standards | WPC, Qi, Fast Wireless Charging 2.0, Wireless PowerShare | WPC, PMA, Qi, Fast Wireless Charging, Wireless PowerShare | |
| Talk Time | 2460 minutes | 2040 minutes | Samsung Galaxy S21 Ultra 5G has longer battery life when making calls than Samsung Galaxy Z Fold3 5G. |
| 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 |
Active online usage (LTE): up to 12 hrs Active online usage (Wi-Fi): up to 12 hrs Playback (wireless video): up to 18 hrs Playback (wireless audio): up to 63 hrs Talk (4G): up to 2040 min |
| CELLULAR | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| 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 10 | |
| Intelligent Assistant | Bixby | Bixby | |
| Payment Technology | Samsung Pay | Samsung Pay | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, GLONASS, BeiDou, Galileo, QZSS |
| COMMUNICATIONS | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| Data Transmission | FDD-LTE, TDD-LTE, 5G NR FR1 | FDD-LTE, TDD-LTE, LAA, 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 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, 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 | 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/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. |
| Ultra-Wideband (UWB) | - | Yes | Samsung Galaxy Z Fold3 5G has UWB wireless technology. |
| MEDIA | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
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| 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, 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, 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, Dolby Digital sound |
| FEATURES | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 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, barometer, gyro sensor, hall sensor, geomagnetic sensor | Accelerometer, proximity sensor, barometer, gyro sensor, hall sensor, geomagnetic sensor, light sensor | |
| Security Devices | Fingerprint reader (under display), face recognition | Face recognition, fingerprint reader (side) | |
| 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 | Multitasking, MIMO technology, notification flashlight, Samsung KNOX, Split Screen, High AOP Mic, Smart View, Samsung DeX support, Bixby Vision, Secure Folder function, TalkBack, Dual Audio, Bixby Routines, Intelligent Performance Enhancer, Samsung Smart Switch, dual battery, Flex mode, Multi Active Window, Bluetooth Scalable Codec, S Pen support |
| OTHERS | Samsung Galaxy S21 Ultra 5G | Samsung Galaxy Z Fold3 5G |
|---|
| Included Accessories | SIM card removal tool, USB-C to USB-C cable | SIM card removal tool, USB-C cable | |
|---|---|---|---|
| Compliant Standards | IP68, HAC (Hearing Aid Compatible) | VDE, IPX8 | |
| Max Depth of Water Resistance | 1.5 m | 1.5 m |
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