Detailed comparison and review of Fairphone 4 and Realme C31. 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 | Fairphone 4 | Realme C31 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | RMX3501 | |
| Form Factor | Touch | Touch | |
| Height | 162 mm | 164.7 mm | Realme C31 has greater height than Fairphone 4. |
| Width | 75.5 mm | 76.1 mm | Realme C31 has greater width than Fairphone 4. |
| Depth | 10.5 mm | 8.4 mm | Realme C31 is narrower than Fairphone 4. |
| Weight | 225 g | 197 g | Realme C31 is lighter than Fairphone 4. |
| Body Colour | Grey | Light silver | Dark green | |
| Waterproof (Water-resistant) | - | - | |
| IP rating | IP54 | - | |
| SAR Value | 0.494 W/kg (head), 0.993 W/kg (body), 2.916 W/kg (limb) | 1.147 W/kg (body), 0.957 W/kg (head), 2.663 W/kg (limb) | |
| Connector Type | USB Type-C - 24 pin USB-C | Micro-USB - 5 pin Micro-USB Type B 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 | Fairphone 4 | Realme C31 |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Display Technology | IPS | - | |
| Screen Size (Display Size) | 6.3" | 6.5" | Realme C31 has larger screen size than Fairphone 4. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | Fairphone 4 has better screen resolution than Realme C31. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 410 ppi | - | |
| Aspect Ratio | 19.5:9 | 20:9 | |
| Colour Depth | 16.7 million colours | 16.7 million colours | Both phones have the same color depth. |
| Display Refresh Rate | - | 60 Hz | |
| Touch Sampling Rate | - | 120 Hz | |
| Display Features | Full Lamination, Pixelworks technology | Ultra-clear View | |
| Display Protection (Screen Protector) | Corning Gorilla Glass 5 (scratch resistant glass) | - |
| PROCESSOR | Fairphone 4 | Realme C31 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 750G | Unisoc | |
|---|---|---|---|
| Processor Number | SM7225 | T612 | |
| Clock Speed | 2.2 GHz | 1.82 GHz | Fairphone 4 has higher clock speed than Realme C31. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| Graphics System (GPU) | Qualcomm ADRENO 619 | ARM Mali-G57 |
| MEMORY | Fairphone 4 | Realme C31 |
|---|
| RAM | 6 GB | LPDDR4X SDRAM - 4 GB + up to 7 GB virtual extension | Fairphone 4 has more RAM than Realme C31. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 64 GB | Fairphone 4 has more internal memory than Realme C31. |
| Memory Interface | - | UFS 2.2 | |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSD, microSDXC - up to 2 TB | microSDHC, microSD, microSDXC - up to 1 TB |
| CAMERA | Fairphone 4 | Realme C31 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 3 | |
|---|---|---|---|
| Sensor Resolution | 48 Megapixel | 13 Megapixel | Fairphone 4 has better camera resolution than Realme C31. |
| Sensor Size | 1/2" | - | |
| Sensor Name | Sony Exmor RS IMX582 sensor | - | |
| Lens Aperture | F/1.6 | F/2.2 | Fairphone 4 has better lens aperture than Fairphone 4. |
| Lens Construction | - | 5-element | |
| Pixel Size | 0.8 μm | - | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | Fairphone 4 has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | 8x | - | |
| Special Effects | HDR | HDR | |
| Camera Modes | Slow motion video, Pro mode, night mode | Burst mode, Panorama, Time-lapse mode, Pro mode, Portrait, Filter mode, Macro mode, Night Pro | |
| Light Source | Dual LED flash | LED flash | |
| Still Image Resolutions | 8000 x 6000 | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1920 x 1080 (1080p) at 60 fps, 3840 x 2160 (4K) at 30 fps, 4000 x 3000 (4K UHD) | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, 854 x 480 (480p) at 30 fps | |
| Camera Features (Functions) | Laser detection auto focus (LDAF), TOF sensor, colour sensor | AI Triple camera |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 48 Megapixel | 2 Megapixel | Fairphone 4 has better second camera resolution than Realme C31. |
|---|---|---|---|
| Lens Type (2nd Camera) | Ultra wide-angle lens | - | |
| Lens Aperture (2nd Camera) | F/2.2 | F/2.4 | Fairphone 4 has better second camera lens aperture than Fairphone 4. |
| Field of View (2nd Camera) | 120 degree(s) | - | |
| Pixel Size (2nd Camera) | 0.8 μm | - | |
| Camera Functions (2nd Camera) | Macro focus | Macro camera | |
| Still Image Resolutions | 8000 x 6000 | - | |
| Camera Features (2nd Camera) | - | 4cm macro photography |
| THIRD CAMERA |
|---|
| Sensor Resolution (3rd Camera) | - | 0.3 Megapixel | |
|---|---|---|---|
| Lens Aperture (3rd Camera) | - | F/2.8 | |
| Camera Functions (3rd Camera) | - | B&W lens |
| FRONT CAMERA |
|---|
| Number of Front Cameras | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 25 Megapixel | 5 Megapixel | Fairphone 4 has better front camera resolution than Realme C31. |
| Sensor Size (Front) | 1/2.78" | - | |
| Sensor Name (Front) | Sony Exmor RS IMX576 sensor | - | |
| Lens Aperture (Front) | F/2.2 | F/2.2 | Both phones have the same front camera lens aperture. |
| Lens Element Qty (Front) | - | 3-element | |
| Focus Adjustment | Focus free | - | |
| Special Effects (Front) | HDR | HDR | |
| Camera Modes (Front) | - | Beauty mode, Filter mode | |
| Video Resolutions (Front) | 1920 x 1080 (1080p) at 30 fps | 1280 x 720 (720p) at 30 fps, 854 x 480 (480p) at 30 fps | |
| Camera Features (Front) | Up to 8x digital zoom, digital image stabilisation, ToF sensor, colour sensor | AI Selfie |
| BATTERY AND CHARGING | Fairphone 4 | Realme C31 |
|---|
| Battery Capacity (Battery Size) | 3905 mAh | 5000 mAh | Realme C31 has larger battery capacity than Fairphone 4. |
|---|---|---|---|
| Standby Time | 200 hours | - | |
| Talk Time | 780 minutes | - | |
| Run Time Details | Talk: up to 780 min Standby: up to 200 hrs |
- | |
| Battery Technology | Lithium Ion | - |
| CELLULAR | Fairphone 4 | Realme C31 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 5G | 4G | Fairphone 4 has more advanced generation mobile network. |
| Operating System | Android 11 | Android 11 | |
| User Interface | - | Realme UI (R Edition) | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou, Galileo, GNSS | GPS, A-GPS, BeiDou, Galileo |
| COMMUNICATIONS | Fairphone 4 | Realme C31 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, VoLTE, VoWiFi, 5G NR | GPRS, EDGE, HSPA+, FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 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 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 18, Band 19, Band 20, Band 28, Band 32, Band 38, Band 40, Band 41, Band 71 | 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 800 lower, FDD 800 upper, FDD 800 DD, FDD 700 APT, FDD 1500 L, TDD 2600, TDD 2300, TDD 2500, FDD 600 | FDD 2100, FDD 1800+, FDD 850, FDD 2600, FDD 900, FDD 800 DD, FDD 700 APT, TDD 2600, TDD 2300, TDD 2500 | |
| 5G NR Band | N1, n3, n5, n7, n8, n20, n28, n38, n41, n71, n77, n78 | - | |
| 5G NR Frequency | FDD 2100, FDD 1800, FDD 850, FDD 2600, FDD 900, FDD 800, FDD 700APT, TDD TD 2600, TDD TD 2500, FDD 600, TDD TD 3700, TDD TD 3500 | - | |
| Wireless Interface | IEEE 802.11a/b/g/n/ac | Wi-Fi | |
| Bluetooth | Bluetooth 5.1 LE | Bluetooth 5.0 | |
| NFC | Yes | - | Fairphone 4 has NFC reader for mobile payments. |
| MEDIA | Fairphone 4 | Realme C31 |
|---|
| Supported Digital Audio Standards | WAV, AAC, AIFF, MP3, FLAC, AAC +, eAAC+, ALAC, OPUS, AMR-WB, AMR-NB, Vorbis, AAC-ELD | - | |
|---|---|---|---|
| Supported Digital Video Standards | XviD, DivX, MPEG-2, H.264, H.263, HEVC, VP9 | - |
| FEATURES | Fairphone 4 | Realme C31 |
|---|
| Sensors | Accelerometer, ambient light sensor, proximity sensor, digital compass, gyro sensor | Accelerometer, proximity sensor, magnetometer, gyro sensor, light sensor | |
|---|---|---|---|
| Security Devices | Fingerprint reader (side) | Fingerprint reader (side) | |
| Additional Phone Features | MIMO technology, modular and repairable design, recycled and fair materials | MIMO technology, Ultra Power Saving Mode, Fast Charging |
| OTHERS | Fairphone 4 | Realme C31 |
|---|
| Included Accessories | - | SIM card removal tool, 10W charger, micro-USB cable | |
|---|---|---|---|
| Compliant Standards | MIL-STD 810G, IP54 | TUV Rheinland |
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