In depth comparison and review of Alcatel POP 4 5051X 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 | Alcatel POP 4 5051X | Realme C21 |
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Product Type | Smartphone | Smartphone | |
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Form Factor | Touch | Touch | |
Height | 140.7 mm | 165.2 mm | Realme C21 has greater height than Alcatel POP 4 5051X. |
Width | 71.4 mm | 76.4 mm | Realme C21 has greater width than Alcatel POP 4 5051X. |
Depth | 7.99 mm | 8.9 mm | Alcatel POP 4 5051X is narrower than Alcatel POP 4 5051X. |
Weight | 134 g | 190 g | Alcatel POP 4 5051X is lighter than Alcatel POP 4 5051X. |
Body Colour | Dark grey | Cross black | Cross blue | |
Waterproof (Water-resistant) | - | - | |
SAR Value | 0.83 W/kg (body), 0.901 W/kg (head) | - | |
Integrated Components | FM radio | - | |
Connector Type | Micro-USB - 5 pin Micro-USB Type B Headset jack - mini-phone 3.5mm |
Micro-USB Headset jack - mini-phone 3.5mm |
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SIM Card Type (Size) | Micro SIM | Nano SIM | |
SIM Card Qty | Single-SIM | Dual-SIM |
DISPLAY | Alcatel POP 4 5051X | 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" | 6.5" | Realme C21 has larger screen size than Alcatel POP 4 5051X. |
Screen Resolution (Display Resolution) | 1280 x 720 pixels | 1600 x 720 pixels | Realme C21 has better screen resolution than Alcatel POP 4 5051X. |
Display Format | HD | HD+ | |
Aspect Ratio | - | 20:9 | |
Max Brightness | - | 420 cd/m² | |
Colour Depth | 16.7 million colours | - | |
Display Features | Full Lamination | Mini-drop display | |
Display Protection (Screen Protector) | Fingerprint-resistant oleophobic coating | - |
PROCESSOR | Alcatel POP 4 5051X | Realme C21 |
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Processor Type (CPU) | Qualcomm Snapdragon 210 | MediaTek Helio G35 | |
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Processor Number | MSM8909 | - | |
Clock Speed | 1.1 GHz | 2.3 GHz | Realme C21 has higher clock speed than Alcatel POP 4 5051X. |
Processor Core Qty | Quad-core | 8-core | Realme C21 has higher processor core quantity than Alcatel POP 4 5051X. |
Graphics System (GPU) | - | PowerVR GE8320 |
MEMORY | Alcatel POP 4 5051X | Realme C21 |
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RAM | 1 GB | LPDDR4X SDRAM - 3 GB | Realme C21 has more RAM than Alcatel POP 4 5051X. |
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Internal Memory Size (Storage Capacity) | 8 GB | 32 GB | Realme C21 has more internal memory than Alcatel POP 4 5051X. |
Supported Flash Memory Cards (Expandable Memory) | microSDHC - up to 32 GB | microSD |
CAMERA | Alcatel POP 4 5051X | Realme C21 |
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MAIN CAMERA |
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Number of Main Cameras | 1 | 3 | |
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Sensor Resolution | 8 Megapixel | 13 Megapixel | Realme C21 has better camera resolution than Alcatel POP 4 5051X. |
Lens Aperture | - | F/2.2 | |
Lens Construction | - | 5-element | |
Focus Adjustment | Automatic | Automatic | |
Digital Zoom | - | 4x | |
Special Effects | - | HDR | |
HDR Mode | Auto HDR mode | - | |
Camera Modes | - | 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 | 1280 x 720 (720p) | 1920 x 1080 (1080p) at 30 fps | |
Camera Features (Functions) | QR-code scanner | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | - | 2 Megapixel | |
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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) | 5 Megapixel | 5 Megapixel | Both phones have the same front camera resolution. |
Lens Type (Front) | Wide-angle lens | - | |
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. |
Light Source (Front) | LED flash | - |
BATTERY AND CHARGING | Alcatel POP 4 5051X | Realme C21 |
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Battery Capacity (Battery Size) | 2500 mAh | 5000 mAh | Realme C21 has larger battery capacity than Alcatel POP 4 5051X. |
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Recharge Time (Charging Time) | 4 hour(s) | - | |
Standby Time | 420 hours | - | |
Talk Time | 720 minutes | - | |
Run Time Details | Talk (GSM): up to 720 min Talk (WCDMA): up to 540 min Talk (LTE): up to 300 min Standby (GSM): up to 420 hrs Standby (WCDMA): up to 420 hrs Standby (LTE): up to 400 hrs |
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CELLULAR | Alcatel POP 4 5051X | 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 6.0 (Marshmallow) | Android 10 | |
User Interface | - | Realme UI | |
Navigation | GPS, A-GPS | GPS, A-GPS, GLONASS, BeiDou |
COMMUNICATIONS | Alcatel POP 4 5051X | Realme C21 |
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Data Transmission | GPRS, EDGE, HSDPA, HSUPA, HSPA+, LTE, FDD-LTE | FDD-LTE, TDD-LTE | |
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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 7, Band 8, Band 20, Band 28 | 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 2600, FDD 900, FDD 800 DD, FDD 700 APT | 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 4.0 | Bluetooth 5.0 | |
Messaging Services | SMS, MMS | - |
MEDIA | Alcatel POP 4 5051X | Realme C21 |
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Supported Digital Audio Standards | AAC | - | |
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Supported Digital Video Standards | MPEG-4, H.264, H.263 | - |
FEATURES | Alcatel POP 4 5051X | Realme C21 |
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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 | |
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Sensors | Ambient light sensor, proximity sensor, digital compass, G-sensor, hall sensor | Accelerometer, proximity sensor, magnetometer, light sensor | |
Security Devices | - | Fingerprint reader | |
Additional Phone Features | HD Voice | Super power saving mode, HyperEngine technology, Reverse charging |
OTHERS | Alcatel POP 4 5051X | Realme C21 |
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Included Accessories | Power adapter | USB cable, power adapter, SIM card removal tool | |
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Compliant Standards | - | TUV Rheinland |