In depth comparison and review of ASUS ZenFone 4 Max (ZC554KL) 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 4 Max (ZC554KL) | Realme C21 |
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Product Type | Smartphone | Smartphone | |
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Manufacturer Model Number | ZC554KL | - | |
Form Factor | Touch | Touch | |
Height | 154 mm | 165.2 mm | Realme C21 has greater height than ASUS ZenFone 4 Max (ZC554KL). |
Width | 76.9 mm | 76.4 mm | ASUS ZenFone 4 Max (ZC554KL) has greater width than Realme C21. |
Depth | 8.9 mm | 8.9 mm | Both phones are the same depth. |
Weight | 181 g | 190 g | ASUS ZenFone 4 Max (ZC554KL) is lighter than ASUS ZenFone 4 Max (ZC554KL). |
Body Colour | Rose pink | Deepsea black | Cross black | Cross blue | |
Body Material | Metal | - | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 1.2 W/kg (body), 0.302 W/kg (head) | - | |
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 |
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SIM Card Type (Size) | Nano SIM | Nano SIM | |
SIM Card Qty | Dual-SIM | Dual-SIM |
DISPLAY | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Display Type | LCD display | LCD display | |
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Display Technology | IPS | LCD | |
Screen Size (Display Size) | 5.5" | 6.5" | Realme C21 has larger screen size than ASUS ZenFone 4 Max (ZC554KL). |
Screen Resolution (Display Resolution) | 1280 x 720 pixels | 1600 x 720 pixels | Realme C21 has better screen resolution than ASUS ZenFone 4 Max (ZC554KL). |
Display Format | HD | HD+ | |
Aspect Ratio | - | 20:9 | |
Max Brightness | - | 420 cd/m² | |
Colour Depth | 16.7 million colours | - | |
Display Enhancement Technology | Blue light filter | - | |
Display Features | 2.5D curved glass | Mini-drop display |
PROCESSOR | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Processor Type (CPU) | Qualcomm Snapdragon 430 | MediaTek Helio G35 | |
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Processor Number | MSM8937 | - | |
Clock Speed | 1.4 GHz | 2.3 GHz | Realme C21 has higher clock speed than ASUS ZenFone 4 Max (ZC554KL). |
Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
64-bit Architecture | Yes | - | ASUS ZenFone 4 Max (ZC554KL) has 64-bit architecture. |
Graphics System (GPU) | Qualcomm ADRENO 505 | PowerVR GE8320 |
MEMORY | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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RAM | LPDDR3 SDRAM - 3 GB | LPDDR4X SDRAM - 3 GB | Both phones have the same RAM size. |
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Internal Memory Size (Storage Capacity) | 32 GB | 32 GB | Both phones have the same internal memory capacity. |
Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSD |
CAMERA | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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MAIN CAMERA |
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Number of Main Cameras | 2 | 3 | |
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Sensor Resolution | 13 Megapixel | 13 Megapixel | Both phones have the same camera resolution. |
Lens Aperture | F/2.0 | F/2.2 | ASUS ZenFone 4 Max (ZC554KL) has better lens aperture than ASUS ZenFone 4 Max (ZC554KL). |
Lens Construction | - | 5-element | |
Focus Adjustment | Automatic | Automatic | |
Laser Auto Focus | Yes | - | |
Digital Zoom | - | 4x | |
Special Effects | - | HDR | |
Camera Modes | Panorama, Pro mode | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
Light Source | LED light | LED flash | |
Video Resolutions | 1920 x 1080 (1080p) at 30 fps | 1920 x 1080 (1080p) at 30 fps | |
Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), Electronic Image Stabiliser (EIS), PixelMaster 4.0 camera, Instant cameras switching | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 5 Megapixel | 2 Megapixel | ASUS ZenFone 4 Max (ZC554KL) has better second camera resolution than Realme C21. |
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Lens Type (2nd Camera) | Wide-angle lens | - | |
Lens Aperture (2nd Camera) | - | F/2.4 | |
Lens Element Qty (2nd Camera) | - | 3-element | |
Camera Functions (2nd Camera) | - | B&W lens |
THIRD CAMERA |
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Sensor Resolution (3rd Camera) | - | 2 Megapixel | |
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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 |
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Number of Front Cameras | 1 | 1 | |
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Sensor Resolution (Front) | 8 Megapixel | 5 Megapixel | ASUS ZenFone 4 Max (ZC554KL) has better front camera resolution than Realme C21. |
Lens Type (Front) | Wide-angle lens | - | |
Lens Aperture (Front) | F/2.2 | F/2.2 | Both phones have the same front camera lens aperture. |
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. |
Light Source (Front) | LED light | - |
BATTERY AND CHARGING | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Battery Capacity (Battery Size) | 5000 mAh | 5000 mAh | Both phones have the same battery capacity. |
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Standby Time | 1104 hours | - | |
Talk Time | 2400 minutes | - | |
Run Time Details | Talk: up to 2400 min Standby: up to 1104 hrs Playback (video): up to 22 hrs Active online usage (Wi-Fi): up to 26 hrs |
- | |
Battery Technology | Lithium polymer | - |
CELLULAR | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
Operating System | Android 7.1.1 Nougat | Android 10 | |
User Interface | ASUS ZenUI | Realme UI | |
Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou |
COMMUNICATIONS | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE, TDD-LTE | FDD-LTE, TDD-LTE | |
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2G Band | 850 GSM, 1800 GSM, 1900 GSM | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
3G UMTS Band | Band 1, Band 5, Band 8 | Band 1, Band 5, Band 8 | |
3G UMTS Frequency | 2100, 850, 900 | 2100, 850, 900 | |
4G LTE Band | Band 1, Band 3, Band 5, Band 7, Band 8, Band 20, Band 40 | 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, TDD 2300 | 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 802.11b/g/n | IEEE 802.11b/g/n | |
Bluetooth | Bluetooth 4.1 | Bluetooth 5.0 | |
Messaging Services | SMS, MMS | - |
FEATURES | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Phone Functions | Speakerphone, call timer, conference call, flight mode, vibrating alert | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
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Sensors | Ambient light sensor, proximity sensor, digital compass, gyro sensor, G-sensor | Accelerometer, proximity sensor, magnetometer, light sensor | |
Security Devices | Fingerprint reader | Fingerprint reader | |
Additional Phone Features | Dual microphones, Google Drive Storage (100 GB) (free for 2 years), power bank function, ASUS PowerMaster | Super power saving mode, HyperEngine technology, Reverse charging |
OTHERS | ASUS ZenFone 4 Max (ZC554KL) | Realme C21 |
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Included Accessories | Headset, power adapter, OTG cable, micro-USB to USB cable | USB cable, power adapter, SIM card removal tool | |
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Compliant Standards | - | TUV Rheinland |