Realme C21Y

Realme C21Y

Build Quality : 75
Display : 90
Camera : 90
Performance : 90
Memory : 95
Network : 90
Connectivity : 80
Battery : 85
Sensor : 90
Audio : 95



July 2021

Official announce date only and not date for market product release.

Model Detail


RMX3261 / RMX3263

Product identifier detail, seems like unique serial number, build number or model id.



Android 11

Type Operating System (OS), included with the OS version number.


Android Stock UI

Specific firmware name identity that used on the davices.

Mobile Network


2G / 3G / 4G

Available mobile network support options.


Dual SIM, Nano SIM

Type and support on Subscriber Identity Module (SIM) feature.



Wi-Fi 802.11 b/g/n

Available enabled features on Wireless internet network connection hardware.


5.0, A2DP, LE

Verison and feature on Bluetooth hardware.


MicroUSB 2.0

Type of Connectivity port hardware.

Body & Design


164.5 x 76 x 9.1 mm

Metric using (Height x Width x Length) on milimeter.


200 g

Metric using (Gram) calculation unit.



Type of main body materials component and the extra feature if available.

Color Options

Black, Blue

Official available body color options.



Unisoc T610

Chipset (CPU) hardware name and series.


Mali-G52 MP2

Graphic (GPU) hardware name and series.



3GB / 4GB

Random Access Memory (RAM) Amount size capacity.


32GB / 64GB

Fully amount size Internal memory storage capacity.



Type of third party memory expansion feature, if available.

Display & Screen



Screen size on (Inch) calculation unit.



Type of display panel hardware for visual.


720 x 1600 pixels

Screen resolution on (Pixel) calculation unit.


20:9 ratio, (~270 ppi density)

Extra display and screen features if available.




Type of Battery model.


5000 mAh

Battery capacity number using Milliampere-hour (mAh) calculation unit.

Charger Model

MicroUSB 2.0

Charging method and type of charger port model.



Extra features on power sector, if available.



Triple Setup

Total main / rear camera number.


(Main) 13 MP, f/2.2, 26mm, 1/3.06", 1.12µm, PDAF

Main camera unit.


(Macro) 2 MP, f/2.4

Secondary camera unit, if available.


(Depth) 2 MP, f/2.4

Third camera unit, if available.



Fourth camera unit, if available.


Single Setup

Total front / selfie camera number, if available.


5 MP, f/2.2, 1/5.0", 1.12µm

Main front camera unit, if available.



Secondary front camera unit, if available.


Video Recording [email protected]

Available video recording support and features.

Audio & Sound



Primary sound system type.


3.5mm jack

Extra sound system features.



Fingerprint (at the rear)

Biometric security hardware model, if available.



Global Positioning System (GPS) hardware support and features.



Near Field Communication (NFC) function support.


Accelerometer, Proximity, Compass

Available sensor hardware type and function.



~ $107

Price on (USD) Dollar currency.


~ €100

Price on (EUR) Euro currency.

Advantage & Disadvantage

Pros :

Can't find any advantage features on this device

  • Has multiple variety rear camera lenses
  • Has external memory card expansion
  • Has dedicated biometric sensor

Cons :

Can't find any disadvantage features on this device

  • Does not support 5G network
  • Does not support NFC
  • Using low quality body material
  • Does not support fast charging feature
  • Using old USB port model
  • RAM capacity relatively small
  • Internal memory capacity relatively small
  • Average WLAN connection speed
  • Using old Bluetooth version

Benchmark Score

Build Quality : 75
Display : 90
Camera : 90
Performance : 90
Memory : 95
Network : 90
Connectivity : 80
Battery : 85
Sensor : 90
Audio : 95

[*] Indicated there was multiple series number (GTIN / MPN) for an product.

Price are aggregate only and may not reflect the real price on the market and the product price may can be different on each country.

We can't guarantee the specifications data are 100% accurate, there may be misspresentating or wrong information because lack of source data or human error.


Realme C21Y is the beautiful device that already officially announces at July 2021, this device adopting modern design with added multiple great features that can be use all their user directly.

The Realme C21Y also known as by the device model series RMX3261 / RMX3263 this model series must be unique, so the user can easily find any other support from the internet, because when only using the main device name it may difficult for several user. Then next for Realme C21Y weight is 200 gram and the body dimension of Realme C21Y is 164.5 x 76 x 9.1 mm which is this the ideal physical body number dimension for modern devices today and the for the last introduction before we can do to the deeper things is the device also available on the Black, Blue color user options.

But, the color options availability itself may be different on the specific market country, some the device color option will only available for limited number such as because the specific event time, after the event ended the color option may be not available for the buyer.

Build Quality

The Realme C21Y using Plastic combination body material, that is very common build material typically found on the entry-level up to middle level devices on the market, plastic material body is not really bad on this modern era, but still this material body it's not solid on hand, look cheap and it may easily to scratch. So, the plastic body material should not be use for flagship devices on higher price range, if you found this material on the latest flagship device it should be minus thing for the user.

Screen & User Navigation

Display screen configuration is very important factor for the user experience, in this Realme C21Y the setup of display screen are ideal which is bring 720 x 1600 pixels on the screen resolution combined with 6.5" screen size. Then the display screen also have several configuration that are 20:9 ratio, (~270 ppi density).

Other the important thing on the display screen is the display panel hardware, good display panel hardware will drive more best experience to the user. Realme C21Y using very common display panel hardware that is IPS LCD, it's good if used by entry-level to middle level devices. But, it should be minus when used by flagship device with higher prices product if there no any special screen technology innovation that implemented.

The physical button on Realme C21Y is made very clear by it's own function, also for design and positioning of the physical button is ideal and can be easily used by user for navigating the device, such as for powering up device or adjusting the volume master.

CPU & GPU Performance

Processor is very vital hardware for processing any task on the device software, this is also included for the Graphic hardware that have main function for rendering graphic image on the device, the both of hardware is related each other every times, on the Realme C21Y we can see this device use Unisoc T610 for CPU model and Mali-G52 MP2 for GPU model, are them good enough?

Yes, they are a good combination, this CPU and GPU setup can be use for handling multiple purpose on this device, such as for run some games, opening some apps, also have good performance when processing and rendering 3D image on the specific level that they can do at the maximal limit.


Besides CPU and GPU hardware, memory hardware is also very important sector for getting best experience for user when use that device for any multiple purpose, the memory sector itself are combination from the RAM capacity, internal memory storage and support for external expansion memory, then does Realme C21Y is good enough on term of memory performance?

When we see the memory combination specification we can see the Realme C21Y have 3GB / 4GB amount of RAM, then also have 32GB / 64GB internal memory storage capacity and the user can get more storage in this device, because Realme C21Y does support external memory expansion with using MicroSDXC type.

Thus, is Realme C21Y have a good memory performance? from the spec said Realme C21Y it's good for use to any purpose in the modern use, but it's also depending from the user perspective need.


Just like other modern smart devices that exist today, Realme C21Y also have camera feature for bringing best experience to their user, on the main / rear camera feature we can found Triple Setup camera configuration feature that exist on there.

The main / rear camera specification on Realme C21Y are (Main) 13 MP, f/2.2, 26mm, 1/3.06", 1.12µm, PDAF for the main camera configuration setup. There was also available for secondary camera feature with spec (Macro) 2 MP, f/2.4. The Realme C21Y still have third camera feature with spec detail (Depth) 2 MP, f/2.4.

Realme C21Y have Single Setup for front / selfie camera feature. The main selfie camera spec on Realme C21Y are 5 MP, f/2.2, 1/5.0", 1.12µm.

Mobile Network

Realme C21Y fully support for using the mobile network broadband, Realme C21Y already supporting by Dual SIM, Nano SIM Card feature. The mobile network technology that using on Realme C21Y are 2G / 3G / 4G, user can freely choose the mode of mobile network on this device, because they can switch easily every times when the user needed.

Connectivity features

Actually, the best device for the modern use it should have multiple connectivity features on it, on the basic perspective the Realme C21Y are already have complete connectivity features.

The wireless connectivity on Realme C21Y that are already supporting by the Wi-Fi technology with the complete spec Wi-Fi 802.11 b/g/n and also supported by Bluetooth version 5.0, A2DP, LE. But sadly, there was no NFC feature on the Realme C21Y.

Realme C21Y also supported by using wired connectivity that use MicroUSB 2.0 Port technology. So, this feature can be very useful to their user for connecting Realme C21Y to the other device such as Desktop Computer or other.

OS & Security

Because Realme C21Y designed for the modern user, that mean Realme C21Y should be operated by the smart Operating System, and the good thing is the Realme C21Y already use smart OS that known as Android 11.

Now, how about the security technology on Realme C21Y? The Realme C21Y have a powerful security protection because this device using default security system from the software OS then combined with the Fingerprint (at the rear) security hardware technology, then it will give more secure from the stranger access.

Speaker & Sound

Speaker hardware on Realme C21Y is very same as most other devices, there was a speaker hardware with using good loudspeaker quaility for calling and play some music and the other feature on this sector that are Realme C21Y fully supported by 3.5mm jack technology, which is very good by the way.


Realme C21Y comes with 5000 mAh battery capacity and have Li-Po battery model, this battery specification basically can be use for all long day use in normal term. But sadly, the Realme C21Y does not have fast charging technology, so the charging time may take more times to fully battery charge.

This device also comes MicroUSB 2.0 that it's very good because the MicroUSB 2.0 is the universal charger Port that can be easy suitable for most charger cable on the most modern phone that exist today.

Common frequently asked questions

When the release date for the Realme C21Y ?

This device officialy unveiled at July 2021, so typically for the availability product at the market it should be around from the time announced.

What is model type / serial number on Realme C21Y ?

The known model type / serial number on Realme C21Y are RMX3261 / RMX3263.

Does Realme C21Y support 5G?

No, Realme C21Y does not support 5G mobile network.

How much Cameras that available on Realme C21Y ?

On the rear camera sector Realme C21Y have Triple Setup camera, and for front / selfie camera Realme C21Y also have Single Setup camera .

What is CPU model on Realme C21Y ?

Realme C21Y using Unisoc T610 for hardware processor series.

What is GPU model on Realme C21Y ?

Realme C21Y using Mali-G52 MP2 GPU model.

How much RAM on Realme C21Y ?

The RAM capacity number on Realme C21Y are 3GB / 4GB.

How big internal Memory size on Realme C21Y ?

The internal Memory size on Realme C21Y are 32GB / 64GB.

Does Realme C21Y support external Memory expansion ?

Yes, external Memory expansion is available on Realme C21Y with using MicroSDXC type.

What the type of screen panel in Realme C21Y ?

Realme C21Y use IPS LCD screen panel type.

Realme C21Y screen size ?

The screen size is 6.5" (inch).

How big screen resolution in Realme C21Y ?

The Realme C21Y screen resolution is 720 x 1600 pixels.

How big battery capacity on Realme C21Y ?

The Realme C21Y comes with 5000 mAh battery capacity.

Does Realme C21Y support Fast Charging ?

No, Realme C21Y does not have fast charging feature.

Does Realme C21Y support NFC ?

No, Realme C21Y does not have NFC feature.

Does Realme C21Y have biometric security hardware ?

Yes, Realme C21Y using Fingerprint (at the rear) for giving the extra security on this device.

What is Port model type on Realme C21Y ?

The Realme C21Y using MicroUSB 2.0 Port model type.

Realme C21Y

Realme C21Y

Benchmark Score

Build Quality : 75
Display : 90
Camera : 90
Performance : 90
Memory : 95
Network : 90
Connectivity : 80
Battery : 85
Sensor : 90
Audio : 95