In depth comparison and review of Xiaomi MI Max 3 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 | Xiaomi MI Max 3 | Realme C21 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Form Factor | Touch | Touch | |
| Height | 176.15 mm | 165.2 mm | Xiaomi MI Max 3 has greater height than Realme C21. |
| Width | 87.4 mm | 76.4 mm | Xiaomi MI Max 3 has greater width than Realme C21. |
| Depth | 7.99 mm | 8.9 mm | Xiaomi MI Max 3 is narrower than Xiaomi MI Max 3. |
| Weight | 221 g | 190 g | Realme C21 is lighter than Xiaomi MI Max 3. |
| Body Colour | - | Cross black | Cross blue | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | 1.417 W/kg (body), 1.584 W/kg (head) | - | |
| Connector Type | USB Type-C - 24 pin USB-C Headset jack - mini-phone 3.5mm |
Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM | |
| SIM Card Configuration Details | Nano SIM + nano SIM/microSD | - |
| DISPLAY | Xiaomi MI Max 3 | Realme C21 |
|---|
| Display Type | LCD display | LCD display | |
|---|---|---|---|
| Display Technology | IPS | LCD | |
| Screen Size (Display Size) | 6.9" | 6.5" | Xiaomi MI Max 3 has larger screen size than Realme C21. |
| Screen Resolution (Display Resolution) | 2160 x 1080 pixels | 1600 x 720 pixels | Xiaomi MI Max 3 has better screen resolution than Realme C21. |
| Display Format | Full HD+ | HD+ | |
| Aspect Ratio | 18:9 | 20:9 | |
| Max Brightness | 520 cd/m² | 420 cd/m² | Xiaomi MI Max 3 has better display brightness than Realme C21. |
| Colour Depth | 16.7 million colours | - | |
| Contrast Ratio | 1500:1 | - | |
| Display Features | Night Display, Sunlight Display, Reading mode, Colour temperature adjustment | Mini-drop display |
| PROCESSOR | Xiaomi MI Max 3 | Realme C21 |
|---|
| Processor Type (CPU) | Qualcomm Snapdragon 636 | MediaTek Helio G35 | |
|---|---|---|---|
| Clock Speed | 1.8 GHz | 2.3 GHz | Realme C21 has higher clock speed than Xiaomi MI Max 3. |
| Processor Core Qty | 8-core | 8-core | Both phones have the same number of phone cores. |
| 64-bit Architecture | Yes | - | Xiaomi MI Max 3 has 64-bit architecture. |
| Graphics System (GPU) | Qualcomm ADRENO 509 | PowerVR GE8320 |
| MEMORY | Xiaomi MI Max 3 | Realme C21 |
|---|
| RAM | LPDDR4X SDRAM - 4 GB | LPDDR4X SDRAM - 3 GB | Xiaomi MI Max 3 has more RAM than Realme C21. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 64 GB | 32 GB | Xiaomi MI Max 3 has more internal memory than Realme C21. |
| Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSDXC - up to 256 GB | microSD |
| CAMERA | Xiaomi MI Max 3 | Realme C21 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 2 | 3 | |
|---|---|---|---|
| Sensor Resolution | 12 Megapixel | 13 Megapixel | Realme C21 has better camera resolution than Xiaomi MI Max 3. |
| Lens Aperture | F/1.9 | F/2.2 | Xiaomi MI Max 3 has better lens aperture than Xiaomi MI Max 3. |
| Lens Construction | - | 5-element | |
| Focus Adjustment | Automatic | Automatic | |
| Digital Zoom | - | 4x | |
| Special Effects | HDR | HDR | |
| Camera Modes | Burst mode, Panorama, AI portrait mode | Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape | |
| Face Recognition (Face ID) | Face recognition | - | Xiaomi MI Max 3 has face detection. |
| Light Source | Dual LED flash | LED flash | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps, 3840 x 2160 (4K) at 30 fps, Slo-mo video 1280 x 720 (720p) at 120 fps | 1920 x 1080 (1080p) at 30 fps | |
| Camera Features (Functions) | Dual Pixel Autofocus technology, AI scene detection | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
| SECOND CAMERA |
|---|
| Sensor Resolution (2nd Camera) | 5 Megapixel | 2 Megapixel | Xiaomi MI Max 3 has better second camera resolution than Realme C21. |
|---|---|---|---|
| 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 | Xiaomi MI Max 3 has better front camera resolution than Realme C21. |
| Lens Aperture (Front) | F/2.0 | F/2.2 | Xiaomi MI Max 3 has better front lens aperture than Xiaomi MI Max 3. |
| Lens Element Qty (Front) | - | 3-element | |
| Special Effects (Front) | - | HDR | |
| Camera Modes (Front) | AI portrait mode, AI Beautify | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | |
| Face Recognition (Face ID) | Face detection | Face recognition | Both phones have face detection. |
| BATTERY AND CHARGING | Xiaomi MI Max 3 | Realme C21 |
|---|
| Battery Capacity (Battery Size) | 5500 mAh | 5000 mAh | Xiaomi MI Max 3 has larger battery capacity than Realme C21. |
|---|---|---|---|
| Fast Charging Technology | Qualcomm Quick Charge 3.0 | - | Xiaomi MI Max 3 has fast charging technology. |
| Standby Time | 474 hours | - | |
| Run Time Details | Playback (video): up to 17 hrs Gaming: up to 10 hrs Playback (audio): up to 233 hrs Standby: up to 474 hrs |
- |
| CELLULAR | Xiaomi MI Max 3 | Realme C21 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 8.1 Oreo | Android 10 | |
| User Interface | MIUI 10 | Realme UI | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS, A-GPS, GLONASS, BeiDou |
| COMMUNICATIONS | Xiaomi MI Max 3 | Realme C21 |
|---|
| Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, VoLTE | FDD-LTE, TDD-LTE | |
|---|---|---|---|
| 2G Band | - | 850 GSM, 900 GSM, 1800 GSM, 1900 GSM | |
| 3G UMTS Band | Band 1, Band 2, Band 5, Band 8 | Band 1, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 1900, 850, 900 | 2100, 850, 900 | |
| 4G LTE Band | Band 1, Band 3, Band 4, Band 5, Band 7, Band 8, Band 20, Band 34, Band 38, 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 1800+, FDD 1700 - 2110 AWS, FDD 850, FDD 2600, FDD 900, FDD 800 DD, TDD 2000, TDD 2600, 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 | Infrared (IrDA), IEEE 802.11a/b/g/n/ac | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 5.0 | |
| Messaging Services | SMS, MMS | - |
| MEDIA | Xiaomi MI Max 3 | Realme C21 |
|---|
| Supported Digital Audio Standards | WAV, AAC, PCM, AMR, MP3, FLAC, AAC +, eAAC+, APE (Monkey's Audio), DSD, AMR-WB, AMR-NB | - | |
|---|---|---|---|
| Supported Digital Video Standards | MKV, VC-1, XviD, MPEG-4, H.264, M4V, HEVC, H.265, MPEG4-ASP | - |
| FEATURES | Xiaomi MI Max 3 | 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 | Accelerometer, proximity sensor, magnetometer, light sensor | |
| Security Devices | Fingerprint reader | Fingerprint reader | |
| Additional Phone Features | Face Unlock, infrared remote control, Split Screen | Super power saving mode, HyperEngine technology, Reverse charging |
| OTHERS | Xiaomi MI Max 3 | Realme C21 |
|---|
| Included Accessories | Power adapter, SIM card removal tool, USB-C cable | USB cable, power adapter, SIM card removal tool | |
|---|---|---|---|
| Compliant Standards | - | TUV Rheinland |
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