Realme C21 vs. Realme 9i

Phone Comparison, Reviews and Tests

In depth comparison and review of Realme C21 and Realme 9i. 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 9i Comparison Chart
DESIGN AND DIMENSIONS Realme C21 Realme 9i
Product Type Smartphone Smartphone
Form Factor Touch Touch
Height 165.2 mm 164.4 mm Realme C21 has greater height than Realme 9i.
Width 76.4 mm 75.7 mm Realme C21 has greater width than Realme 9i.
Depth 8.9 mm 8.4 mm Realme 9i is narrower than Realme C21.
Weight 190 g 190 g Both phones are the same weight.
Body Colour Cross black | Cross blue Prism black | Prism blue
Waterproof (Water-resistant) - -
SAR Value - 1.02 W/kg (body), 2.072 W/kg (limb), 0.788 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 Nano SIM
SIM Card Qty Dual-SIM Dual-SIM
DISPLAY Realme C21 Realme 9i
Display Type LCD display -
Display Technology LCD -
Screen Size (Display Size) 6.5" 6.6" Realme 9i has larger screen size than Realme C21.
Screen Resolution (Display Resolution) 1600 x 720 pixels 2412 x 1080 pixels Realme 9i has better screen resolution than Realme C21.
Display Format HD+ Full HD+
Pixel Density - 401 ppi
Aspect Ratio 20:9 -
Max Brightness 420 cd/m² 480 cd/m² Realme 9i has better display brightness than Realme C21.
Display Enhancement Technology - Ultra-Smooth
Display Refresh Rate - 90 Hz
Touch Sampling Rate - 180 Hz
Display Features Mini-drop display 5-level fresh rates
Display Protection (Screen Protector) - Dragontrail PRO (scratch resistant glass)
PROCESSOR Realme C21 Realme 9i
Processor Type (CPU) MediaTek Helio G35 Qualcomm Snapdragon 680
Clock Speed 2.3 GHz 2.4 GHz Realme 9i has higher clock speed than Realme C21.
Processor Core Qty 8-core 8-core Both phones have the same number of phone cores.
Graphics System (GPU) PowerVR GE8320 Qualcomm ADRENO 610
MEMORY Realme C21 Realme 9i
RAM LPDDR4X SDRAM - 3 GB LPDDR4X SDRAM - 4 GB + up to 11 GB virtual extension Realme 9i has more RAM than Realme C21.
Internal Memory Size (Storage Capacity) 32 GB 128 GB Realme 9i has more internal memory than Realme C21.
Memory Interface - UFS 2.1
Supported Flash Memory Cards (Expandable Memory) microSD microSDHC, microSD, microSDXC - up to 1 TB
CAMERA Realme C21 Realme 9i
MAIN CAMERA
Number of Main Cameras 3 3
Sensor Resolution 13 Megapixel 50 Megapixel Realme 9i has better camera resolution than Realme C21.
Lens Aperture F/2.2 F/1.8 Realme 9i has better lens aperture than Realme C21.
Lens Construction 5-element 5-element
Focus Adjustment Automatic Automatic
Digital Zoom 4x -
Special Effects HDR HDR
Camera Modes Panorama, Time-lapse mode, Slow motion mode, Beauty mode, Expert Mode, Nightscape capture mode, Portrait, Filter mode, Super nightscape Panorama, Slow motion mode, night mode, Expert Mode, portrait mode, Timelapse video, Ultra Macro Mode, 50MP mode, Super Text, Digital Zoom mode
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, 1280 x 720 (720p) at 120 fps
Camera Features (Functions) Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost Phase Detect Auto-Focus (PDAF), AI Triple camera
SECOND CAMERA
Sensor Resolution (2nd Camera) 2 Megapixel 2 Megapixel Both phones have the same second camera resolution.
Lens Aperture (2nd Camera) F/2.4 F/2.4 Both phones have the same second camera lens aperture.
Lens Element Qty (2nd Camera) 3-element -
Camera Functions (2nd Camera) B&W lens Macro camera
Camera Features (2nd Camera) - 4cm macro photography
THIRD CAMERA
Sensor Resolution (3rd Camera) 2 Megapixel 2 Megapixel Both phones have the same third camera resolution.
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 B&W lens
Camera Features (3rd Camera) 4cm macro photography -
FRONT CAMERA
Number of Front Cameras 1 1
Sensor Resolution (Front) 5 Megapixel 16 Megapixel Realme 9i has better front camera resolution than Realme C21.
Lens Aperture (Front) F/2.2 F/2.1 Realme 9i has better front lens aperture than Realme C21.
Lens Element Qty (Front) 3-element 5-element
Special Effects (Front) HDR HDR
Camera Modes (Front) Time-lapse mode, Beauty mode, portrait mode, AI Beauty, Filter mode, Panoramic mode Panorama, Time-lapse mode, night mode, portrait mode, AI Beauty
Face Recognition (Face ID) Face recognition - Realme C21 has face detection.
Video Resolutions (Front) - 1920 x 1080 (1080p) at 30 fps, 1280 x 720 (720p) at 30 fps
BATTERY AND CHARGING Realme C21 Realme 9i
Battery Capacity (Battery Size) 5000 mAh 5000 mAh Both phones have the same battery capacity.
Fast Charging Technology - Dart Charge Realme 9i has fast charging technology.
Standby Time - 995 hours
Talk Time - 2904 minutes
Run Time Details - Standby: up to 995 hrs
Talk: up to 2904 min
WhatsApp: up to 20.7 hrs
Playback (Music): up to 116.3 hrs
CELLULAR Realme C21 Realme 9i
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
User Interface Realme UI Realme UI 2.0
Navigation GPS, A-GPS, GLONASS, BeiDou GPS, GLONASS, BeiDou, Galileo
COMMUNICATIONS Realme C21 Realme 9i
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 5, Band 8
3G UMTS Frequency 2100, 850, 900 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 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 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 Wi-Fi
Bluetooth Bluetooth 5.0 Bluetooth 5.0
NFC - Yes Realme 9i has NFC reader for mobile payments.
FEATURES Realme C21 Realme 9i
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, magnetometer, light sensor
Security Devices Fingerprint reader Fingerprint reader (side)
Additional Phone Features Super power saving mode, HyperEngine technology, Reverse charging Dual microphones, Fast Charging, Super power saving mode, dual stereo speakers
OTHERS Realme C21 Realme 9i
Included Accessories USB cable, power adapter, SIM card removal tool Screen protection film, SIM card removal tool, USB-C cable, protective case, 33W charger
Compliant Standards TUV Rheinland -
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