Summary

Technical sheet of realme C21

Description

Pros
Cons
  • Battery
  • Price
  • External Storage
  • Camera quality
  • No 5G

Realme, a brand known for offering affordable yet feature-packed smartphones, released the realme C21 in March 2021. This low-end smartphone is designed to cater to users looking for a budget-friendly device without compromising on essential features. Let's delve into the details of the realme C21 and see what it has to offer.

Design & Materials

The realme C21 sports a 6.50-inch LCD IPS screen with a resolution of 720x1600 (HD+). With a brightness of 400 cd/m² (typ) and a contrast ratio of 1500:1, the display delivers decent visuals for everyday use. The device is made of plastic, which may not be as premium as glass or metal but helps keep the cost down. Despite the material choice, the realme C21 manages to achieve an impressive usable surface area of 81.3%, providing a comfortable viewing experience for users.

Hardware

Under the hood, the realme C21 is powered by a Mediatek Helio G35 processor built on a 12nm process. The device comes with either 3GB or 4GB of LPDDR4X RAM, allowing for smooth multitasking. In terms of storage, users can choose between 32GB or 64GB of eMMC 5.1 storage, with the option to expand further using external storage. The realme C21 scores 110490 on AnTuTu (v8), reflecting its performance capabilities in the budget segment.

Camera

The realme C21 features a triple camera setup on the rear, comprising a 13.0-megapixel standard camera with an aperture of f/2.2 and a pixel size of 1.120μm. Additionally, there is a 2.0-megapixel black & white camera with an aperture of f/2.4 and a pixel size of 1.750μm, along with a 2.0-megapixel macro lens with similar specifications. For selfie enthusiasts, the device offers a 5.0-megapixel front camera with an aperture of f/2.2 and a pixel size of 1.120μm. While the camera setup may not deliver flagship-level results, it should suffice for casual photography needs.

Connectivity

In terms of connectivity, the realme C21 supports Bluetooth 5.0 and dual SIM functionality, allowing users to stay connected on the go. Additionally, the device retains the traditional audio jack, catering to users who prefer wired headphones or speakers for audio output.

Battery

One of the standout features of the realme C21 is its impressive 5000mAh battery capacity, ensuring long-lasting usage without the need for frequent recharging. The device supports 10.0W fast charging, although it may not be as speedy as higher-end models. Another useful feature is reverse charging, allowing users to use their device as a power bank to charge other devices in emergencies.

Summary

When weighing the pros and cons of the realme C21, several factors stand out. The device's battery capacity is undoubtedly a strong point, offering extended usage times for users who rely heavily on their smartphones throughout the day. The affordability of the realme C21 is another key advantage, making it an attractive option for budget-conscious consumers. The ability to expand storage using external options provides added flexibility for users who require more space for their files and media.

On the downside, the camera quality of the realme C21 may not meet the expectations of users who prioritize photography capabilities in their smartphones. Additionally, the absence of 5G connectivity may be a drawback for users looking for faster network speeds and future-proofing.

In conclusion, the realme C21 is a solid choice for users seeking a low-end smartphone with essential features at an affordable price point. While it may not offer top-of-the-line specifications, it fulfills the basic requirements of a smartphone effectively. With a reliable battery, expandable storage, and decent performance, the realme C21 is a practical option for those on a budget.

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Brand

Brand realme
Aliases RMX3201
Best Sellers
Smartphones by realme

realme C21 prices

Versions and prices
realme C21 SE. Asia · 3GB · 32GB
realme C21 SE. Asia · 4GB · 64GB
realme C21 India · 3GB · 32GB
realme C21 India · 4GB · 64GB
realme C21 Global · 3GB · 32GB $ 129
realme C21 Global · 4GB · 64GB $ 74
Read More

Release Date

Release dateMarch 2021, 3 years ago

Related

Predecessor
Successors

Design & Materials of realme C21

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Structure

Size
76.4 mm165.2 mm8.9 mm
Print 3D Model
Weight 190 g
Usable surface 81 %
Materials Plastic
Colors
Black
Blue

Screen

Diagonal
6.5"
Type LCD IPS
Aspect Ratio 20:9
Resolution 720 x 1600 px HD+
Density 269 ppi Medium Density
Others
  • Water Drop Notch
  • Touch sampling rate 120 Hz
  • Brightnes 400 cd/m² (typ)
  • 1500:1 contrast ratio
  • TÜV Rheinland Eye Comfort Certification
  • Scratch resistant
  • 2.5D curved glass screen
  • Capacitive
  • Multi-touch
  • Frameless
Best big screen mobilesBest phones with IPS screen

Performance & Hardware of realme C21

Processor

Model Mediatek Helio G35
CPU 8x CortexA53 2.3 GHz
Type Octa-Core
Nanometer 12 nm
Frequency 2.3 GHz
64 Bits Yes
More smartphones with MediaTek Helio G35 processor

Graphics

GPU IMG PowerVR GE8320 680MHz

RAM

RAM 3 GB
Type LPDDR4X RAM
More smartphones with 3GB RAM memory

Antutu

Score
110.490 Antutu v8
Overall performance better than 50% of devices

Storage

Capacity 32 GB
Type eMMC 5.1 Storage
SD Slot Yes , Independent SD slot
More smartphones with 32GB of internal storage

Security

Fingerprint Yes, in the back

Sensors

Fingerprint No
Proximity Yes
Light sensor Yes
Accelerometer Yes
Gravity Yes
Magnetometer Yes
Others
Notifications LED --
Cooling system No
Gaming buttons No

Camera of realme C21

Triple rear camera

Standard
1
Resolution 13 Mpx
Sensor --
Type CMOS
Aperture ƒ/ 2.2
ISO --
Pixel size 1.12 µm
Black & white
2
Resolution
2 Mpx
Sensor
--
Type
--
Aperture
ƒ/ 2.4
Pixel size
1.75 µm
3
Resolution
2 Mpx
Sensor
--
Type
--
Aperture
ƒ/ 2.4
Pixel size
1.75 µm
Flash LED
Optical Stabilisation No
Slow Motion Video Yes, 90 fps
Features
  • Digital zoom
  • Triple camera
  • Autofocus
  • Touch focus
  • Continuous shooting
  • Geotagging
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
More smartphones with lens modelMore smartphones with LED

Selfie

Resolution 5 Mpx
Sensor --
Type --
Aperture ƒ/ 2.2
Pixel size 1.12 µm
Kimovil Frequency Checker

Network compatibility

Connectivity of realme C21

Bands

4G LTE B1 (2100), B3 (1800), B5 (850), B7 (2600), B8 (900), B20 (800), B28b (700), B28a (700), B38 (TDD 2600), B40 (TDD 2300), B41 (TDD 2500)
3G B1 (2100), B5 (850), B8 (900)
2G B2 (1900), B3 (1800), B5 (850), B8 (900)

SIM card

TypeDual SIM Dual Standby (Nano SIM + Nano SIM)

SIM cards (MiniSIM) can be cut to MicroSIM, MicroSIM can be cut to NanoSIM and a SIM can even be cut to a NanoSIM (although not recommended). Download this SIM Cutting Template and forget about having to ask your operator for a new SIM...

Wi-Fi

Standards 802.11b , 802.11g , 802.11n
Others
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct

Bluetooth

Version Bluetooth 5.0 LELow energy consumption
Profiles
  • A2DP (Advanced Audio Distribution Profile)
  • EDR (Enhanced Data Rate)
  • LE (Low Energy)

Navigation

Supports GPS, A-GPS, GLONASS, Beidou

USB

Charging Yes
Mass Storage Yes
USB On-The-Go (OTG) Yes

SAR

European measurement 0.740 W/Kg on head, 1.151 W/Kg on body

The European Union sets a limit of 2 W/kg averaged over 10 grams of tissue.

What is the SAR of realme C21?
Others
NFC
No
Audio Jack
Yes
Radio FM
Yes
Computer sync
Yes
OTA sync
Yes
Tethering.
Yes
VoLTE
Yes

Battery of realme C21

Capacity
5000 mAh
Type Lithium
Fast charge Yes , 10.0W
Others
  • Reverse charging
  • Non-removable

Software of realme C21

Software

Operating System Android 10 Q
RealmeUI (Android 10)
Google Services (official) Yes
More smartphones with RealmeUI (Android 10) operating system

User reviews about the realme C21

Overall satisfaction
Not enough reviews
4 reviews
  • Screen7.8
  • Performance5.1
  • Camera5.4
  • Connectivity7.3
  • Battery9.3
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Last update
March 2, 2024
State
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Latest changes
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  • Pros & Cons 1 month ago
6.4
Ki Cost-effective
Score
  • 5.4 Design & Materials
  • 5.1 Performance & Hardware
  • 5.0 Camera
  • 5.2 Connectivity
  • 7.0 Battery
What is a Ki score?
Ki is an automatic score based on the specifications and prices of devices. It is calculated using over 200 variables to rank smartphones, tablets and other devices from best to worst.
How do we calculate the Ki?

In this case, to determine the score we evaluate 5 general aspects:

  • Design and screen
  • Hardware and performance
  • Camera
  • Connectivity
  • Battery

Once these 5 factors have been rated, we introduce the price variable. This means that any two devices with the same ratings get a different Ki score for quality vs price.

Even a device objectively worse than another may have a higher Ki score if it has a better price.

Does the Ki score change?

The Ki varies as time goes by. As new devices with better specifications enter the market the Ki score of older devices will go down, always being compensated of their decrease in price.