Realme C21 vs. Realme 6i

Phone Comparison, Reviews and Tests

In depth comparison and review of Realme C21 and Realme 6i. 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.

Phone Specifications Comparison

Realme C21 vs. Realme 6i Comparison Chart
DESIGN AND DIMENSIONS Realme C21 Realme 6i
Product Type Smartphone Smartphone
Form Factor Touch Touch
Height 165.2 mm 164.4 mm Realme C21 has greater height than Realme 6i.
Width 76.4 mm 75.4 mm Realme C21 has greater width than Realme 6i.
Depth 8.9 mm 9 mm Realme C21 is narrower than Realme C21.
Weight 190 g 199 g Realme C21 is lighter than Realme C21.
Body Colour Cross black | Cross blue Milk white
Waterproof (Water-resistant) - -
SAR Value - 0.59 W/kg (body), 1.14 W/kg (head)
Connector Type Micro-USB
Headset jack - mini-phone 3.5mm
USB Type-C - 24 pin USB-C
SIM Card Type (Size) Nano SIM -
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Realme C21 Realme 6i
Display Type LCD display -
Display Technology LCD -
Screen Size (Display Size) 6.5" 6.5" Both phones have the same screen size.
Screen Resolution (Display Resolution) 1600 x 720 pixels 1600 x 720 pixels Both phones have the same screen resolution.
Display Format HD+ HD+
Aspect Ratio 20:9 20:9
Max Brightness 420 cd/m² -
Display Features Mini-drop display Eye Care, Mini-drop display
Display Protection (Screen Protector) - Corning Gorilla Glass 3 (scratch resistant glass)
PROCESSOR Realme C21 Realme 6i
Processor Type (CPU) MediaTek Helio G35 MediaTek Helio G80
Clock Speed 2.3 GHz 2 GHz Realme C21 has higher clock speed than Realme 6i.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
Graphics System (GPU) PowerVR GE8320 Mali-G52
MEMORY Realme C21 Realme 6i
RAM LPDDR4X SDRAM - 3 GB LPDDR4X SDRAM - 4 GB Realme 6i has more RAM than Realme C21.
Internal Memory Size (Storage Capacity) 32 GB 128 GB Realme 6i has more internal memory than Realme C21.
Supported Flash Memory Cards (Expandable Memory) microSD microSD
CAMERA Realme C21 Realme 6i
MAIN CAMERA
Number of Main Cameras 3 4
Sensor Resolution 13 Megapixel 48 Megapixel Realme 6i has better camera resolution than Realme C21.
Lens Aperture F/2.2 F/1.8 Realme 6i has better lens aperture than Realme C21.
Lens Construction 5-element -
Focus Adjustment Automatic 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 LED flash
Video Resolutions 1920 x 1080 (1080p) at 30 fps 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 AI Quad camera
SECOND CAMERA
Sensor Resolution (2nd Camera) 2 Megapixel 8 Megapixel Realme 6i has better second camera resolution than Realme C21.
Lens Type (2nd Camera) - Ultra wide-angle lens
Lens Aperture (2nd Camera) F/2.4 F/2.3 Realme 6i has better second camera lens aperture than Realme C21.
Lens Element Qty (2nd Camera) 3-element -
Field of View (2nd Camera) - 119 degree(s)
Camera Functions (2nd Camera) B&W lens -
THIRD CAMERA
Sensor Resolution (3rd Camera) 2 Megapixel -
Lens Aperture (3rd Camera) F/2.4 F/2.4 Both phones have the same lens aperture of the third camera.
Lens Element Qty (3rd Camera) 3-element -
Camera Functions (3rd Camera) Macro camera Potrait camera
Camera Features (3rd Camera) 4cm macro photography B&W Portrait lens
FOURTH CAMERA
Sensor Resolution (4th Camera) - 2 Megapixel
Lens Aperture (4th Camera) - F/2.4
Camera Functions (4th Camera) - Macro camera
Camera Features (4th Camera) - 4cm macro photography
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 5 Megapixel 16 Megapixel Realme 6i has better front camera resolution than Realme C21.
Lens Aperture (Front) F/2.2 F/2.0 Realme 6i has better front lens aperture than Realme C21.
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 AI Beauty
Face Recognition (Face ID) Face recognition Face recognition Both phones have face detection.
BATTERY AND CHARGING Realme C21 Realme 6i
Battery Capacity (Battery Size) 5000 mAh 5000 mAh Both phones have the same battery capacity.
Standby Time - 936 hours
Talk Time - 1758 minutes
Run Time Details - Standby: up to 936 hrs
Talk: up to 1758 min
Playback (Music): up to 54.7 hrs
Continuous viewing (YouTube): up to 20.6 hrs
Continuous viewing (Instagram): up to 19.7 hrs
CELLULAR Realme C21 Realme 6i
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 10
User Interface Realme UI Realme UI
Navigation GPS, A-GPS, GLONASS, BeiDou GPS, A-GPS, GLONASS, BeiDou
COMMUNICATIONS Realme C21 Realme 6i
Data Transmission FDD-LTE, TDD-LTE FDD-LTE, TDD-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 4, Band 5, Band 8
3G UMTS Frequency 2100, 850, 900 2100, 1900, 1700, 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 2, Band 3, Band 4, 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 FDD 2100, FDD 1900 PCS, FDD 1800+, FDD 1700 - 2110 AWS, 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 5.0
NFC - Yes Realme 6i has NFC reader for mobile payments.
FEATURES Realme C21 Realme 6i
Phone Functions Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert -
Sensors Accelerometer, proximity sensor, magnetometer, light sensor Accelerometer, ambient light sensor, proximity sensor, magnetometer, gyro sensor
Security Devices Fingerprint reader -
Additional Phone Features Super power saving mode, HyperEngine technology, Reverse charging -
OTHERS Realme C21 Realme 6i
Included Accessories USB cable, power adapter, SIM card removal tool SIM card removal tool, USB-C cable, protective case, 18W charger, protective film
Compliant Standards TUV Rheinland -
Other projects: