In depth comparison and review of Samsung Galaxy Z Flip and Realme C21. 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.
| DESIGN AND DIMENSIONS | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | SM-F700F/DS | - | |
| Form Factor | Folder (flip) - touch screen, dual screen | Touch | |
| Height | 167.3 mm | 165.2 mm | Samsung Galaxy Z Flip has greater height than Realme C21. |
| Width | 73.6 mm | 76.4 mm | Realme C21 has greater width than Samsung Galaxy Z Flip. |
| Depth | 6.9 mm | 8.9 mm | Samsung Galaxy Z Flip is narrower than Samsung Galaxy Z Flip. |
| Weight | 183 g | 190 g | Samsung Galaxy Z Flip is lighter than Samsung Galaxy Z Flip. |
| Dimensions Details | Unfolded - 73.6 mm x 6.9 mm x 167.3 mm Folded - 73.6 mm x 15.4 mm x 87.4 mm |
- | |
| Body Colour | Grey | Mirror black | Mirror purple | Cross black | Cross blue | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.369 W/kg (head), 1.546 W/kg (body) | - | |
| Connector Type | USB Type-C - 24 pin USB-C | Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM, Electronic SIM card (e-SIM) | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Display Type | OLED display | LCD display | |
|---|---|---|---|
| Display Technology | Infinity Flex Dynamic AMOLED | LCD | |
| Screen Size (Display Size) | 6.7" | 6.5" | Samsung Galaxy Z Flip has larger screen size than Realme C21. |
| Screen Resolution (Display Resolution) | 2636 x 1080 pixels | 1600 x 720 pixels | Samsung Galaxy Z Flip has better screen resolution than Realme C21. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 425 ppi | - | |
| Aspect Ratio | 21.9:9 | 20:9 | |
| Max Brightness | - | 420 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| Display Features | Always-on display, Edge Screen, Edge Lighting, Video Wallpaper | Mini-drop display | |
| Display Protection (Screen Protector) | Samsung Ultra Thin Glass | - |
| SECOND DISPLAY |
|---|
| Second Display Type | OLED display - colour | - | |
|---|---|---|---|
| Second Display Screen Size | 1.05" | - | |
| Second Display Resolution | 300 x 112 pixels | - | |
| Second Display Colour Depth | 16.7 million colours | - |
| PROCESSOR | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Processor Type (CPU) | - | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | 2.9 GHz | 2.3 GHz | Samsung Galaxy Z Flip has higher clock speed than Realme C21. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Samsung Galaxy Z Flip has 64-bit architecture. |
| Graphics System (GPU) | - | PowerVR GE8320 |
| MEMORY | Samsung Galaxy Z Flip | Realme C21 |
|---|
| RAM | 8 GB | LPDDR4X SDRAM - 3 GB | Samsung Galaxy Z Flip has more RAM than Realme C21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 256 GB | 32 GB | Samsung Galaxy Z Flip has more internal memory than Realme C21. |
| User Memory | 223.3 GB | - | |
| Supported Flash Memory Cards (Expandable Memory) | - | microSD |
| CAMERA | Samsung Galaxy Z Flip | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 3 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 13 Megapixel | Realme C21 has better camera resolution than Samsung Galaxy Z Flip. |
| Lens Type | Wide-angle lens | - | |
| Lens Aperture | F/1.8 | F/2.2 | Samsung Galaxy Z Flip has better lens aperture than Samsung Galaxy Z Flip. |
| Lens Construction | - | 5-element | |
| Field of View (FoV) | 78 degree(s) | - | |
| Pixel Size | 1.4 μm | - | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | Samsung Galaxy Z Flip has optical stabilisation. |
| Focus Adjustment | Automatic, manual | Automatic | |
| Digital Zoom | 8x | 4x | Samsung Galaxy Z Flip has better digital zoom than Realme C21. |
| Self-Timer Delay | Yes | - | |
| Special Effects | HDR, Grid Line | HDR | |
| Camera Modes | Slow motion video, Panorama, Pro mode, HYPERLAPSE, Live Focus mode, Super Slow-mo, AR Emoji, Flowers, Greenery, Trees, Sky, Mountains, Beaches, Watersides, Snow, Backlit, Text, Motion Photos, Food, Face, Baby, Person, Dog, Cat, People, Sunset, Sunrise, City, Waterfall, Scenery, Stage, Vehicles, Drinks, Animal, Shoes, Indoor, Clothes, Night view, Live focus video, Filter mode | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
| Light Source | High CRI LED flash | 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, Slo-mo video 1920 x 1080 (1080p) at 240 fps, Slo-mo video 1280 x 720 (720p) at 960 fps | 1920 x 1080 (1080p) at 30 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, Flaw detection, 9.1MP still photos recording 4K video, Shot suggestions, blur detection, HDR10+ recording, Floating shutter button, Super steady, Super Speed Dual Pixel AF, AR Doodle | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 12 Megapixel | 2 Megapixel | Samsung Galaxy Z Flip has better second camera resolution than Realme C21. |
|---|---|---|---|
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.4 | Samsung Galaxy Z Flip has better second camera lens aperture than Samsung Galaxy Z Flip. |
| Lens Element Qty (2nd Camera) | - | 3-element | |
| Field of View (2nd Camera) | 123 degree(s) | - | |
| Camera Functions (2nd Camera) | - | B&W lens |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.4 | |
| Lens Element Qty (3rd Camera) | - | 3-element | |
| Camera Functions (3rd Camera) | - | Macro camera | |
| Camera Features (3rd Camera) | - | 4cm macro photography |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 10 Megapixel | 5 Megapixel | Samsung Galaxy Z Flip has better front camera resolution than Realme C21. |
| Lens Aperture (Front) | F/2.4 | F/2.2 | Realme C21 has better front lens aperture than Samsung Galaxy Z Flip. |
| Lens Element Qty (Front) | - | 3-element | |
| Field of View (Front) | 80 degree(s) | - | |
| Pixel Size (Front) | 1.22 μm | - | |
| Focus Adjustment | Automatic | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | Live Focus mode, Live focus video | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | |
| Face Recognition (Face ID) | - | Face recognition | Realme C21 has face detection. |
| BATTERY AND CHARGING | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Battery Capacity (Battery Size) | 3300 mAh | 5000 mAh | Realme C21 has larger battery capacity than Samsung Galaxy Z Flip. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 2.0, Adaptive Fast Charging | - | Samsung Galaxy Z Flip has fast charging technology. |
| Wireless Charging | Yes | - | Samsung Galaxy Z Flip can be charged wirelessly. |
| Wireless Charging Standards | WPC, Qi, Wireless PowerShare | - | |
| Talk Time | 2100 minutes | - | |
| Run Time Details | Active online usage (LTE): up to 13 hrs Active online usage (Wi-Fi): up to 13 hrs Playback (wireless video): up to 18 hrs Playback (wireless audio): up to 42 hrs Talk (LTE): up to 2100 min |
- |
| CELLULAR | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Technology | TD-SCDMA / WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 10 | Android 10 | |
| User Interface | - | Realme UI | |
| Intelligent Assistant | Bixby | - | |
| Payment Technology | Samsung Pay | - | |
| Navigation | GPS, GLONASS, BeiDou, Galileo | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, FDD-LTE, TDD-LTE, Gigabit LTE | FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM, 800 CDMA2000 1X, 1900 CDMA2000 1X, 2100 CDMA2000 1X (AWS) | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 4, Band 5, Band 8 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 900 | 2100, 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 29, Band 30, Band 34, Band 38, Band 39, Band 40, Band 41, Band 66 | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 28, Band 38, Band 40, Band 41 | |
| 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 700d, FDD 2300 WCS, TDD 2000, TDD 2600, TDD 1900, TDD 2300, TDD 2500, FDD 1700 - 2110 AWS-3 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac, ANT+ | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 5.0 LE | Bluetooth 5.0 | |
| NFC | Yes | - | Samsung Galaxy Z Flip has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | Samsung Galaxy Z Flip | Realme C21 |
|---|
| 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 | - | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, FLV, AVI, MPEG-4, WMV, ASF, 3GP, M4V, WebM, 3G2 | - | |
| Sound Enhancements | Dolby Digital Plus sound, Dolby Digital sound | - |
| FEATURES | Samsung Galaxy Z Flip | Realme C21 |
|---|
| 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, RGB sensor, geomagnetic sensor | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | Face recognition, fingerprint reader (side) | Fingerprint reader | |
| Additional Phone Features | MU-MIMO technology, Samsung KNOX, High AOP Mic, Smart View, Bixby Vision, Bixby Routines, Intelligent Performance Enhancer, Flex mode, Multi Active Window, Thom Browne Theme | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | Samsung Galaxy Z Flip | Realme C21 |
|---|
| Included Accessories | Power adapter, leather cover, Galaxy Watch Active2, gray leather and a black rubber watch straps, Galaxy Buds+ (Thom Browne colors and a grey cradle) | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | VDE | TUV Rheinland |
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