In depth comparison and review of Realme C21 and Alcatel U3 2019. 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 | Realme C21 | Alcatel U3 2019 |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | 4034L | |
| Form Factor | Touch | Touch | |
| Height | 165.2 mm | 121.3 mm | Realme C21 has greater height than Alcatel U3 2019. |
| Width | 76.4 mm | 64.4 mm | Realme C21 has greater width than Alcatel U3 2019. |
| Depth | 8.9 mm | 9.7 mm | Realme C21 is narrower than Realme C21. |
| Weight | 190 g | 110 g | Alcatel U3 2019 is lighter than Realme C21. |
| Body Colour | Cross black | Cross blue | - | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | - | 1.48 W/kg (body), 1.08 W/kg (head) | |
| Integrated Components | - | FM radio | |
| Connector Type | Micro-USB Headset jack - mini-phone 3.5mm |
Micro-USB Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | - | |
| SIM Card Qty | Dual-SIM | Single-SIM |
| DISPLAY | Realme C21 | Alcatel U3 2019 |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Display Technology | LCD | - | |
| Screen Size (Display Size) | 6.5" | 4" | Realme C21 has larger screen size than Alcatel U3 2019. |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 800 x 480 pixels | Realme C21 has better screen resolution than Alcatel U3 2019. |
| Display Format | HD+ | WVGA | |
| Aspect Ratio | 20:9 | - | |
| Max Brightness | 420 cd/m² | - | |
| Display Features | Mini-drop display | - |
| PROCESSOR | Realme C21 | Alcatel U3 2019 |
|---|
| Processor Type (CPU) | MediaTek Helio G35 | MediaTek | |
|---|---|---|---|
| Processor Number | - | MT6580M | |
| Clock Speed | 2.3 GHz | 1.3 GHz | Realme C21 has higher clock speed than Alcatel U3 2019. |
| Processor Core Qty | 8-core | Quad-core | Realme C21 has higher processor core quantity than Alcatel U3 2019. |
| Graphics System (GPU) | PowerVR GE8320 | - |
| MEMORY | Realme C21 | Alcatel U3 2019 |
|---|
| RAM | LPDDR4X SDRAM - 3 GB | 512 MB | Realme C21 has more RAM than Alcatel U3 2019. |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 4 GB | Realme C21 has more internal memory than Alcatel U3 2019. |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSD |
| CAMERA | Realme C21 | Alcatel U3 2019 |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 1 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 3 Megapixel | Realme C21 has better camera resolution than Alcatel U3 2019. |
| Lens Aperture | F/2.2 | - | |
| Lens Construction | 5-element | - | |
| Focus Adjustment | 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 | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps | - | |
| Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost | Interpolated to 3MP |
| 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) | 5 Megapixel | 1.3 Megapixel | Realme C21 has better front camera resolution than Alcatel U3 2019. |
| 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. |
| Camera Features (Front) | - | Interpolated to 1.3MP |
| BATTERY AND CHARGING | Realme C21 | Alcatel U3 2019 |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 1500 mAh | Realme C21 has larger battery capacity than Alcatel U3 2019. |
|---|
| CELLULAR | Realme C21 | Alcatel U3 2019 |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 3G | Realme C21 has more advanced generation mobile network. |
| Operating System | Android 10 | Android 8.0 Oreo (Go edition) | |
| User Interface | Realme UI | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS |
| COMMUNICATIONS | Realme C21 | Alcatel U3 2019 |
|---|
| Data Transmission | FDD-LTE, TDD-LTE | GPRS, EDGE | |
|---|---|---|---|
| 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 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 802.11b/g/n | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 4.0 |
| MEDIA | Realme C21 | Alcatel U3 2019 |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, AMR, MP3, FLAC, AAC +, MIDI, Vorbis |
|---|
| FEATURES | Realme C21 | Alcatel U3 2019 |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, magnetometer, light sensor | G-sensor | |
| Security Devices | Fingerprint reader | - | |
| Additional Phone Features | Super power saving mode, HyperEngine technology, Reverse charging | - |
| OTHERS | Realme C21 | Alcatel U3 2019 |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool | - | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | - |
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