In depth comparison and review of ASUS ZenFone 3 Deluxe (ZS570KL) 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 | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | ZS570KL | - | |
| Form Factor | Touch | Touch | |
| Height | 156.4 mm | 165.2 mm | Realme C21 has greater height than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Width | 77.4 mm | 76.4 mm | ASUS ZenFone 3 Deluxe (ZS570KL) has greater width than Realme C21. |
| Depth | 7.5 mm | 8.9 mm | ASUS ZenFone 3 Deluxe (ZS570KL) is narrower than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Weight | 192 g | 190 g | Realme C21 is lighter than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Body Colour | Gold | Cross black | Cross blue | |
| Body Material | Metal | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 0.97 W/kg (body), 0.663 W/kg (head) | - | |
| Integrated Components | FM radio | - | |
| Connector Type | Headset jack - mini-phone 3.5mm USB Type-C - 24 pin USB-C |
Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Micro SIM, nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Micro SIM + nano SIM/microSD | - |
| DISPLAY | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Display Type | OLED display | LCD display | |
|---|---|---|---|
| Display Technology | Super AMOLED | LCD | |
| Screen Size (Display Size) | 5.7" | 6.5" | Realme C21 has larger screen size than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Screen Resolution (Display Resolution) | 1920 x 1080 pixels | 1600 x 720 pixels | ASUS ZenFone 3 Deluxe (ZS570KL) has better screen resolution than Realme C21. |
| Display Format | Full HD | HD+ | |
| Aspect Ratio | - | 20:9 | |
| Max Brightness | - | 420 cd/m² | |
| Contrast Ratio | 3000000:1 | - | |
| Display Enhancement Technology | Bluelight Filter for Eye Care | - | |
| Display Features | ASUS Glove Touch technology, ASUS Tru2Life | Mini-drop display | |
| Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating, Corning Gorilla Glass 4 (scratch resistant glass) | - |
| PROCESSOR | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 820 | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | 2.15 GHz | 2.3 GHz | Realme C21 has higher clock speed than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Processor Core Qty | Quad-core | 8-core | Realme C21 has higher processor core quantity than ASUS ZenFone 3 Deluxe (ZS570KL). |
| 64-bit Architecture | Yes | - | ASUS ZenFone 3 Deluxe (ZS570KL) has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 530 | PowerVR GE8320 |
| MEMORY | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| RAM | 6 GB | LPDDR4X SDRAM - 3 GB | ASUS ZenFone 3 Deluxe (ZS570KL) has more RAM than Realme C21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 128 GB | 32 GB | ASUS ZenFone 3 Deluxe (ZS570KL) has more internal memory than Realme C21. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 128 GB | microSD |
| CAMERA | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 1 | 3 | |
|---|---|---|---|
| Sensor Resolution | 23 Megapixel | 13 Megapixel | ASUS ZenFone 3 Deluxe (ZS570KL) has better camera resolution than Realme C21. |
| Lens Aperture | F/2.0 | F/2.2 | ASUS ZenFone 3 Deluxe (ZS570KL) has better lens aperture than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Lens Construction | 6-element | 5-element | |
| Optical Image Stabiliser (OIS) | Optical Image Stabiliser (OIS) | - | ASUS ZenFone 3 Deluxe (ZS570KL) has optical stabilisation. |
| Focus Adjustment | Automatic | Automatic | |
| Laser Auto Focus | Yes | - | |
| Digital Zoom | - | 4x | |
| Special Effects | - | HDR | |
| HDR Mode | Super HDR | - | |
| Camera Modes | Super resolution mode, low-light shots | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
| Light Source | Dual LED flash | LED flash | |
| Video Resolutions | 3840 x 2160 (4K) | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Electronic Image Stabiliser (EIS), backlight compensation | 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) | 8 Megapixel | 5 Megapixel | ASUS ZenFone 3 Deluxe (ZS570KL) has better front camera resolution than Realme C21. |
| Lens Type (Front) | Wide-angle lens | - | |
| Lens Aperture (Front) | F/2.0 | F/2.2 | ASUS ZenFone 3 Deluxe (ZS570KL) has better front lens aperture than ASUS ZenFone 3 Deluxe (ZS570KL). |
| Lens Element Qty (Front) | - | 3-element | |
| Focus Adjustment | Focus free | - | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | Selfie panorama | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | |
| Face Recognition (Face ID) | - | Face recognition | Realme C21 has face detection. |
| Camera Features (Front) | PixelMaster camera | - |
| BATTERY AND CHARGING | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Battery Capacity (Battery Size) | 3000 mAh | 5000 mAh | Realme C21 has larger battery capacity than ASUS ZenFone 3 Deluxe (ZS570KL). |
|---|---|---|---|
| Battery Technology | Lithium polymer | - |
| CELLULAR | ASUS ZenFone 3 Deluxe (ZS570KL) | 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 6.0 (Marshmallow) | Android 10 | |
| User Interface | ASUS ZenUI 3.0 | Realme UI | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, EV-DO, HSDPA, HSUPA, HSPA+, 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 5, Band 8 | |
| 3G UMTS Frequency | - | 2100, 850, 900 | |
| 4G LTE Band | Band 1, Band 2, Band 3, Band 4, Band 5, Band 7, Band 8, Band 12, Band 17, Band 18, Band 20, Band 26, Band 28, Band 29, Band 30, Band 39, Band 40, Band 41 | 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 700b, FDD 800 lower, FDD 800 DD, FDD 850+, FDD 700 APT, FDD 700d, FDD 2300 WCS, TDD 1900, TDD 2300, TDD 2500 | 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 4.2 | Bluetooth 5.0 | |
| Bluetooth Profiles | A2DP | - | |
| NFC | Yes | - | ASUS ZenFone 3 Deluxe (ZS570KL) has NFC reader for mobile payments. |
| Messaging Services | SMS, MMS | - |
| MEDIA | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Supported Digital Video Standards | MPEG-4, H.264 | - |
|---|
| FEATURES | ASUS ZenFone 3 Deluxe (ZS570KL) | 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, gyro sensor, hall sensor, RGB sensor | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | Fingerprint reader | Fingerprint reader | |
| Additional Phone Features | Infrared remote control, Dual microphones, MIMO technology, Power Saving Mode, Hi-Res Audio, Glove Touchscreen Operation, ASUS BoostMaster technology, ASUS WebStorage (5GB), Google Drive Storage (100 GB) (free for 2 years), ASUS SonicMaster 3.0 technology, NXP Smart AMP technology | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | ASUS ZenFone 3 Deluxe (ZS570KL) | Realme C21 |
|---|
| Included Accessories | Headset, power adapter | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
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