In depth comparison and review of OPPO Find X 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 | OPPO Find X | Realme C21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | CPH1875 | - | |
| Form Factor | Touch | Touch | |
| Height | 156.7 mm | 165.2 mm | Realme C21 has greater height than OPPO Find X. |
| Width | 74.2 mm | 76.4 mm | Realme C21 has greater width than OPPO Find X. |
| Depth | 9.6 mm | 8.9 mm | Realme C21 is narrower than OPPO Find X. |
| Weight | 186 g | 190 g | OPPO Find X is lighter than OPPO Find X. |
| Body Colour | Bordeaux red | Glacier blue | Cross black | Cross blue | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.658 W/kg (body), 1.57 W/kg (head), 3.99 W/kg (limb) | - | |
| Connector Type | USB Type-C - 24 pin USB-C | Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | OPPO Find X | Realme C21 |
|---|
| Display Type | OLED display | LCD display | |
|---|---|---|---|
| Display Technology | AMOLED | LCD | |
| Screen Size (Display Size) | 6.4" | 6.5" | Realme C21 has larger screen size than OPPO Find X. |
| Screen Resolution (Display Resolution) | 2340 x 1080 pixels | 1600 x 720 pixels | OPPO Find X has better screen resolution than Realme C21. |
| Display Format | Full HD+ | HD+ | |
| Pixel Density | 430 ppi | - | |
| Aspect Ratio | 19.5:9 | 20:9 | |
| Max Brightness | 430 cd/m² | 420 cd/m² | OPPO Find X has better display brightness than Realme C21. |
| Colour Depth | 16.7 million colours | - | |
| Display Features | Panoramic Arc Screen | Mini-drop display |
| PROCESSOR | OPPO Find X | Realme C21 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 845 | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | - | 2.3 GHz | |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | OPPO Find X has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 630 | PowerVR GE8320 |
| MEMORY | OPPO Find X | Realme C21 |
|---|
| RAM | 8 GB | LPDDR4X SDRAM - 3 GB | OPPO Find X has more RAM than Realme C21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 256 GB | 32 GB | OPPO Find X has more internal memory than Realme C21. |
| Supported Flash Memory Cards (Expandable Memory) | - | microSD |
| CAMERA | OPPO Find X | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 3 | |
|---|---|---|---|
| Sensor Resolution | 20 Megapixel | 13 Megapixel | OPPO Find X has better camera resolution than Realme C21. |
| Lens Aperture | F/2.0 | F/2.2 | OPPO Find X has better lens aperture than OPPO Find X. |
| Lens Construction | - | 5-element | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | OPPO Find X has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 4x | |
| Special Effects | - | HDR | |
| Camera Modes | - | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
| Light Source | LED flash | LED flash | |
| Video Resolutions | - | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | AI Dual camera, AI Beautify, AI scene recognition | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 16 Megapixel | 2 Megapixel | OPPO Find X has better second camera resolution than Realme C21. |
|---|---|---|---|
| Lens Aperture (2nd Camera) | F/2.0 | F/2.4 | OPPO Find X has better second camera lens aperture than OPPO Find X. |
| Lens Element Qty (2nd Camera) | - | 3-element | |
| 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 | 3 | 1 | |
|---|---|---|---|
| Front Camera Design | Pop-up | - | |
| Sensor Resolution (Front) | 25 Megapixel | 5 Megapixel | OPPO Find X has better front camera resolution than Realme C21. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | OPPO Find X has better front lens aperture than OPPO Find X. |
| Lens Element Qty (Front) | - | 3-element | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | - | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | |
| Face Recognition (Face ID) | - | Face recognition | Realme C21 has face detection. |
| SECOND FRONT CAMERA |
|---|
| Camera Features (2nd Front) | Flood Illuminator, Dot Projector | - |
|---|
| THIRD FRONT CAMERA |
|---|
| Camera Functions (3rd Front) | Infrared Camera | - |
|---|
| BATTERY AND CHARGING | OPPO Find X | Realme C21 |
|---|
| Battery Capacity (Battery Size) | 3400 mAh | 5000 mAh | Realme C21 has larger battery capacity than OPPO Find X. |
|---|---|---|---|
| Fast Charging Technology | SuperVOOC Flash Charge technology | - | OPPO Find X has fast charging technology. |
| CELLULAR | OPPO Find X | Realme C21 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | ColorOS 5.1 (based on Android 8.1) | Android 10 | |
| User Interface | - | Realme UI | |
| Navigation | GPS, A-GPS | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | OPPO Find X | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, VoLTE, FDD-LTE, TDD-LTE | 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 6, Band 8, Band 19 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 1700, 850, 800, 900, 800 | 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 32, 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 1500 L, 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 | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
| Messaging Services | SMS, MMS | - |
| FEATURES | OPPO Find X | 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, ambient light sensor, proximity sensor, digital compass | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | Face recognition | Fingerprint reader | |
| Security Technology | Laser 3D face recognition | - | |
| Additional Phone Features | 3D Structured Light technology | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | OPPO Find X | Realme C21 |
|---|
| Included Accessories | Headset, power adapter, SIM card removal tool, pre-installed screen protection film, USB-C cable, USB-C to 3.5 jack audio cable, protective case | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
cs
sk
de
it
es
fr
hu
pt
ru
pl
br
ro
