In depth comparison and review of Realme C21 and Alcatel 1 (2021). 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 1 (2021) |
|---|
| Product Type | Smartphone | Smartphone | |
|---|---|---|---|
| Manufacturer Model Number | - | 5033DR | |
| Form Factor | Touch | Touch | |
| Height | 165.2 mm | 137.6 mm | Realme C21 has greater height than Alcatel 1 (2021). |
| Width | 76.4 mm | 65.7 mm | Realme C21 has greater width than Alcatel 1 (2021). |
| Depth | 8.9 mm | 9.8 mm | Realme C21 is narrower than Realme C21. |
| Weight | 190 g | 134 g | Alcatel 1 (2021) is lighter than Realme C21. |
| Body Colour | Cross black | Cross blue | Volcano black | |
| Waterproof (Water-resistant) | - | - | |
| SAR Value | - | 1.63 W/kg (body), 0.91 W/kg (head), 3.49 W/kg (limb) | |
| Integrated Components | - | LED flashlight | |
| Connector Type | Micro-USB Headset jack - mini-phone 3.5mm |
Micro-USB - 5 pin Micro-USB Type B Headset jack - mini-phone 3.5mm |
|
| SIM Card Type (Size) | Nano SIM | Nano SIM | |
| SIM Card Qty | Dual-SIM | Dual-SIM |
| DISPLAY | Realme C21 | Alcatel 1 (2021) |
|---|
| Display Type | LCD display | - | |
|---|---|---|---|
| Display Technology | LCD | - | |
| Screen Size (Display Size) | 6.5" | 5" | Realme C21 has larger screen size than Alcatel 1 (2021). |
| Screen Resolution (Display Resolution) | 1600 x 720 pixels | 960 x 480 pixels | Realme C21 has better screen resolution than Alcatel 1 (2021). |
| Display Format | HD+ | FWVGA+ | |
| Aspect Ratio | 20:9 | 18:9 | |
| Max Brightness | 420 cd/m² | - | |
| Display Enhancement Technology | - | Eye comfort mode | |
| Display Features | Mini-drop display | FullView Display | |
| Display Protection (Screen Protector) | - | AGS Asahi Glass |
| PROCESSOR | Realme C21 | Alcatel 1 (2021) |
|---|
| Processor Type (CPU) | MediaTek Helio G35 | MediaTek | |
|---|---|---|---|
| Processor Number | - | MT6739 | |
| Clock Speed | 2.3 GHz | 1.28 GHz | Realme C21 has higher clock speed than Alcatel 1 (2021). |
| Processor Core Qty | 8-core | Quad-core | Realme C21 has higher processor core quantity than Alcatel 1 (2021). |
| Graphics System (GPU) | PowerVR GE8320 | IMG GE8100 |
| MEMORY | Realme C21 | Alcatel 1 (2021) |
|---|
| RAM | LPDDR4X SDRAM - 3 GB | 1 GB | Realme C21 has more RAM than Alcatel 1 (2021). |
|---|---|---|---|
| Internal Memory Size (Storage Capacity) | 32 GB | 8 GB | Realme C21 has more internal memory than Alcatel 1 (2021). |
| User Memory | - | 5 GB | |
| Supported Flash Memory Cards (Expandable Memory) | microSD | microSDHC, microSD - up to 32 GB |
| CAMERA | Realme C21 | Alcatel 1 (2021) |
|---|
| MAIN CAMERA |
|---|
| Number of Main Cameras | 3 | 1 | |
|---|---|---|---|
| Sensor Resolution | 13 Megapixel | 5 Megapixel | Realme C21 has better camera resolution than Alcatel 1 (2021). |
| Sensor Size | - | 1/5" | |
| Lens Aperture | F/2.2 | F/2.4 | Realme C21 has better lens aperture than Realme C21. |
| Lens Construction | 5-element | 3-element | |
| Field of View (FoV) | - | 76 degree(s) | |
| Pixel Size | - | 1.12 μm | |
| Focus Adjustment | Automatic | Focus free | |
| 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 tracking | Alcatel 1 (2021) has face detection. |
| Light Source | LED flash | - | |
| Video Resolutions | 1920 x 1080 (1080p) at 30 fps | 1280 x 720 (720p) 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) | 5 Megapixel | 2 Megapixel | Realme C21 has better front camera resolution than Alcatel 1 (2021). |
| Sensor Size (Front) | - | 1/5" | |
| Lens Aperture (Front) | F/2.2 | F/2.8 | Realme C21 has better front lens aperture than Realme C21. |
| Lens Element Qty (Front) | 3-element | 2-element | |
| Field of View (Front) | - | 61 degree(s) | |
| Pixel Size (Front) | - | 1.75 μm | |
| Focus Adjustment | - | Focus free | |
| Special Effects (Front) | HDR | Photo booth, Instant Collage, Social Square | |
| Camera Modes (Front) | Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode | One-handed mode, Social Mode | |
| Face Recognition (Face ID) | Face recognition | Face tracking | Both phones have face detection. |
| Video Resolutions (Front) | - | 1280 x 720 (720p) at 30 fps |
| BATTERY AND CHARGING | Realme C21 | Alcatel 1 (2021) |
|---|
| Battery Capacity (Battery Size) | 5000 mAh | 2000 mAh | Realme C21 has larger battery capacity than Alcatel 1 (2021). |
|---|---|---|---|
| Recharge Time (Charging Time) | - | 3.4 hour(s) | |
| Standby Time | - | 310 hours | |
| Talk Time | - | 1020 minutes | |
| Run Time Details | - | Standby (2G): up to 310 hrs Standby (3G): up to 300 hrs Standby (4G): up to 210 hrs Talk (2G): up to 1020 min Talk (3G): up to 660 min Talk (4G): up to 480 min |
| CELLULAR | Realme C21 | Alcatel 1 (2021) |
|---|
| Technology | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | |
|---|---|---|---|
| Mobile Broadband Generation | 4G | 4G | Both phones have the same mobile network generation. |
| Operating System | Android 10 | Android 11 (Go edition) | |
| User Interface | Realme UI | - | |
| Navigation | GPS, A-GPS, GLONASS, BeiDou | GPS |
| COMMUNICATIONS | Realme C21 | Alcatel 1 (2021) |
|---|
| Data Transmission | FDD-LTE, TDD-LTE | GPRS, EDGE, HSPA+, 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 | Band 1, Band 2, Band 5, Band 8 | |
| 3G UMTS Frequency | 2100, 850, 900 | 2100, 1900, 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 | Band 1, Band 3, Band 7, Band 8, Band 20 | |
| 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 | FDD 2100, FDD 1800+, FDD 2600, FDD 900, FDD 800 DD | |
| Wireless Interface | IEEE 802.11b/g/n | IEEE 802.11b/g/n | |
| Bluetooth | Bluetooth 5.0 | Bluetooth 4.2 |
| MEDIA | Realme C21 | Alcatel 1 (2021) |
|---|
| Supported Digital Audio Standards | - | WAV, AAC, AMR, MP3, FLAC, AAC +, MIDI, APE (Monkey's Audio), Vorbis | |
|---|---|---|---|
| Supported Digital Video Standards | - | MPEG-2, H.263, HEVC, VP8, VP9, H.265, H.264 AVC |
| FEATURES | Realme C21 | Alcatel 1 (2021) |
|---|
| Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | - | |
|---|---|---|---|
| Sensors | Accelerometer, proximity sensor, magnetometer, light sensor | Accelerometer, proximity sensor | |
| Security Devices | Fingerprint reader | - | |
| Additional Phone Features | Super power saving mode, HyperEngine technology, Reverse charging | Smart Manager |
| OTHERS | Realme C21 | Alcatel 1 (2021) |
|---|
| Included Accessories | USB cable, power adapter, SIM card removal tool | - | |
|---|---|---|---|
| Compliant Standards | TUV Rheinland | - |
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