In depth comparison and review of Lenovo S820 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 | Lenovo S820 | Realme C21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 139.5 mm | 165.2 mm | Realme C21 has greater height than Lenovo S820. |
| Width | 69.7 mm | 76.4 mm | Realme C21 has greater width than Lenovo S820. |
| Depth | 9 mm | 8.9 mm | Realme C21 is narrower than Lenovo S820. |
| Weight | 143 g | 190 g | Lenovo S820 is lighter than Lenovo S820. |
| Body Colour | Flamingo red | Cross black | Cross blue | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.572 W/kg (body) | - | |
| Integrated Components | FM radio | - | |
| Connector Type | Headset jack - mini-phone 3.5mm Micro-USB - 5 pin Micro-USB Type B |
Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Micro SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Lenovo S820 | Realme C21 |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | LCD | |
| Screen Size (Display Size) | 4.7" | 6.5" | Realme C21 has larger screen size than Lenovo S820. |
| Screen Resolution (Display Resolution) | 1280 x 720 pixels | 1600 x 720 pixels | Realme C21 has better screen resolution than Lenovo S820. |
| Display Format | HD | HD+ | |
| Pixel Density | 312 ppi | - | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 420 cd/m² | |
| Colour Depth | 16.7 million colours | - | |
| Display Features | - | Mini-drop display | |
| Display Protection (Screen Protector) | Corning Gorilla Glass (scratch resistant glass) | - |
| PROCESSOR | Lenovo S820 | Realme C21 |
|---|
| Processor Type (CPU) | MediaTek | MediaTek Helio G35 | |
|---|---|---|---|
| Processor Number | MT6589 | - | |
| Clock Speed | 1.2 GHz | 2.3 GHz | Realme C21 has higher clock speed than Lenovo S820. |
| Processor Core Qty | Quad-core | 8-core | Realme C21 has higher processor core quantity than Lenovo S820. |
| Graphics System (GPU) | PowerVR SGX544 | PowerVR GE8320 |
| MEMORY | Lenovo S820 | Realme C21 |
|---|
| RAM | 1 GB | LPDDR4X SDRAM - 3 GB | Realme C21 has more RAM than Lenovo S820. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 4 GB | 32 GB | Realme C21 has more internal memory than Lenovo S820. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC - up to 32 GB | microSD |
| CAMERA | Lenovo S820 | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 3 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 13 Megapixel | Realme C21 has better camera resolution than Lenovo S820. |
| Lens Aperture | - | F/2.2 | |
| Lens Construction | - | 5-element | |
| 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 | |
| Face Recognition (Face ID) | Face detection | - | Lenovo S820 has face detection. |
| Light Source | LED light | LED flash | |
| Video Resolutions | - | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | - | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | - | 2 Megapixel | |
|---|---|---|---|
| Lens Aperture (2nd Camera) | - | F/2.4 | |
| 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 | 1 | 1 | |
|---|---|---|---|
| Sensor Resolution (Front) | 2 Megapixel | 5 Megapixel | Realme C21 has better front camera resolution than Lenovo S820. |
| Lens Aperture (Front) | - | F/2.2 | |
| 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. |
| BATTERY AND CHARGING | Lenovo S820 | Realme C21 |
|---|
| Battery Capacity (Battery Size) | 2000 mAh | 5000 mAh | Realme C21 has larger battery capacity than Lenovo S820. |
|---|---|---|---|
| Standby Time | 140 hours | - | |
| Talk Time | 1320 minutes | - | |
| Run Time Details | Talk (GSM): up to 1320 min Talk (WCDMA): up to 600 min Standby (GSM): up to 140 hrs Standby (WCDMA): up to 140 hrs |
- | |
| Battery Technology | Lithium polymer | - |
| CELLULAR | Lenovo S820 | Realme C21 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 3G | 4G | Realme C21 has more advanced generation mobile network. |
| Operating System | Android 4.2 (Jelly Bean) | Android 10 | |
| User Interface | - | Realme UI | |
| Navigation | GPS, A-GPS | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | Lenovo S820 | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+ | FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | 900 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | - | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 850, 900 | |
| 4G LTE Band | - | 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 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 | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 3.0 | Bluetooth 5.0 | |
| Bluetooth Profiles | A2DP | - | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Lenovo S820 | Realme C21 |
|---|
| Supported Digital Audio Standards | WAV, WMA, MP3, eAAC+ | - | |
|---|---|---|---|
| Supported Digital Video Standards | MPEG-4, WMV, H.264 | - |
| FEATURES | Lenovo S820 | Realme C21 |
|---|
| Phone Functions | Speakerphone, call timer, conference call, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | - | Fingerprint reader | |
| Additional Phone Features | Active noise-cancellation | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | Lenovo S820 | Realme C21 |
|---|
| Included Accessories | USB cable, power adapter | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
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