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Get the key specs, technical data, ratings and full review of Realme C21 64 GB all in one place. Compare your selected model with other alternatives and give your decision on the best phone a solid base with our comprehensive overview.
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DESIGN AND DIMENSIONS Realme C21 64 GB |
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Product Type | Smartphone | |
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Form Factor | Touch | |
Height | 165.2 mm | Better than 97 % of phones rated. |
Width | 76.4 mm | Better than 88 % of phones rated. |
Depth | 8.9 mm | Better than 66 % of phones rated. |
Weight | 190 g | Worse than 85 % of phones rated. |
Body Colour | Cross blue | |
Waterproof (Water-resistant) | - | |
Connector Type |
Micro-USB Headset jack - mini-phone 3.5mm |
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SIM Card Type (Size) | Nano SIM | |
SIM Card Qty | Dual-SIM |
The Realme C21 64 GB has dimensions 165.2 mm × 76.4 mm × 8.9 mm. Its weight is 190 g.
Show moreDISPLAY Realme C21 64 GB |
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Display Type | LCD display | |
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Display Technology | LCD | |
Screen Size (Display Size) | 6.5" | Better than 91 % of phones rated. |
Screen Resolution (Display Resolution) | 1600 x 720 pixels | Better than 69 % of phones rated. |
Display Format | HD+ | |
Aspect Ratio | 20:9 | |
Max Brightness | 420 cd/m² | |
Display Features | Mini-drop display |
The screen size reaches 6.5" inches. With a large display, phone offers a great experience for watching videos, playing games and reading. The best phones today are 6.5'' or more. They have the advantage of a large display area that allows you to see more content than with conventional display sizes. LCD displays are currently taking a back seat. This is mainly due to higher power consumption. In addition, they have the disadvantage of lower colour contrast, which can be reflected e.g. in the resulting photos. On the other hand, phones with LCD displays are in general cheaper than those with OLED technology.
Display Resolution of Realme C21 64 GB is 1600 x 720 pixels. A higher display resolution is a prerequisite for a sharper image. The standard for mid-range phones today is a Full HD resolution of 1920 × 1080 px. Cheaper phones, which usually have a smaller diagonal, have an HD resolution of 1280 × 720 px. Smaller resolutions can only be found in older models. Best phones, on the other hand, have a 4K resolution of 3840 x 2160 px.
PROCESSOR Realme C21 64 GB |
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Processor Type (CPU) | MediaTek Helio G35 | |
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Clock Speed | 2.3 GHz | Better than 83 % of phones rated. |
Processor Core Qty | 8-core | Better than 99 % of phones rated. |
Graphics System (GPU) | PowerVR GE8320 |
Realme C21 64 GB is supplied with MediaTek Helio G35. The number of processor cores is 8. It is a number of cores that plays an important role in evaluating the performance of phone as it is responsible for computing operations. Smartphones already commonly have a core count of around 4 to 8. Multi-core processors can perform better and reduce the processing time of a request to a minimum, which is reflected in the responsiveness of the phone, e.g. in the speed of opening applications. Another important parameter is the processor frequency, which indicates how many instructions the phone can process in one second. Similar to refresh rate, the higher the number, the faster the phone responds. Processor frequency of phone Realme C21 64 GB is 2.3 GHz. As standard today, you'll find this value between 1.8 GHz and 2.8 GHz.
The processor also includes the graphics accelerator PowerVR GE8320.
MEMORY Realme C21 64 GB |
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RAM | LPDDR4X SDRAM - 4 GB | Better than 81 % of phones rated. |
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Internal Memory Size (Storage Capacity) | 64 GB | Better than 75 % of phones rated. |
Supported Flash Memory Cards (Expandable Memory) | microSDHC, microSD, microSDXC - up to 256 GB |
One of the most important parameters for user´s decision is often internal memory capacity. The larger it is, the more apps, photos, movies and other files your phone can store. This phone has 64 GB storage. It is currently the most common storage size among today´s smartphones. The capacity is perfectly adequate for the average user. It will allow you to store thousands of photos, high-resolution videos, dozens of apps and several games on your phone. But if you're one of those really demanding users and you use your phone to shoot 4K videos etc., then you should rather pay extra to have a larger storage of 256 GB or more. Nowadays, you can usually find one phone model on the market with several different memory sizes. This allows each user to choose what suits them best.
For this model it is possible to increase the storage size by inserting a memory card.
Size of the RAM memory tells us how powerful the phone is. Realme C21 64 GB is equipped with LPDDR4X SDRAM - 4 GB. Commonly today you will find phones with 6 to 8 GB of RAM. This means that the phone can easily handle normal operation and more demanding applications or games. Higher RAM of 12 GB can be found in best phones on market and are ideal especially for avid gamers. On the other hand, operating memory below 4 GB is more of an issue with lower-end phones and older models. However, even they will find their fans among less demanding users, who don´t want to spend much on buying new phone.
CAMERA Realme C21 64 GB |
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MAIN CAMERA |
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Number of Main Cameras | 3 | |
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Sensor Resolution | 13 Megapixel | Better than 78 % of phones rated. |
Lens Aperture | F/2.2 | Worse than 73 % of phones rated. |
Lens Construction | 5-element | |
Focus Adjustment | Automatic | |
Digital Zoom | 4x | Better than 57 % of phones rated. |
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 | |
Video Resolutions | 1920 x 1080 (1080p) at 30 fps | |
Camera Features (Functions) | Phase Detect Auto-Focus (PDAF), AI Triple camera, Chroma boost |
SECOND CAMERA |
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Sensor Resolution (2nd Camera) | 2 Megapixel | Worse than 84 % of phones rated. |
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Lens Aperture (2nd Camera) | F/2.4 | Worse than 63 % of phones rated. |
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 | Worse than 61 % of phones rated. |
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Lens Aperture (3rd Camera) | F/2.4 | Better than 76 % of phones rated. |
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 | |
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Sensor Resolution (Front) | 5 Megapixel | Worse than 55 % of phones rated. |
Lens Aperture (Front) | F/2.2 | Better than 51 % of phones rated. |
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 | Better than 92 % of phones rated. |
The rear camera of the phone Realme C21 64 GB has 3 lenses. Today's modern phones usually have several rear lenses. The most common are macro lens, telephoto lens and wide-angle lens. Each is used to capture the perfect photo - macro lens is designed for close-up photography, telephoto lens, often equipped with an optical zoom, is for photos of objects in distance, and wide-angle lens captures larger areas where you need a wider field of view. The resolution of main lens is 13 Megapixel. Nonetheless, resolution alone does not necessarily mean a good photo. Therefore, you should look at other parameters such as lens aperture or pixel size. Another important factor is the aperture, which in this case is F/2.2 and determines how much light passes through the sensor. Best phones have an aperture of up to F/1.5. But the most common lenses today are F/1.8 to F/2.2. In this case, the lower the number after the slash, the higher the photo quality.
Digital zoom in this case offers zooming up to 4x. Of course, the higher the lens value, the more distant object can be zoomed in. Nonetheless, the disadvantage of digital zoom is that the quality and sharpness of photo deteriorates when using it.
Second camera
The resolution reaches size of 2 Megapixel. In addition, this lens also features lens aperture of F/2.4.
Third camera
The resolution of third lens is then 2 Megapixel. The aperture reaches size of F/2.4.
Front camera
The front camera of phone Realme C21 64 GB has one lens. This number of lenses is standard on most smartphones nowadays. The lens is equipped with 5 Megapixel. However, do not forget there are other factors than resolution having impact on the final quality of front camera photos. The main front lens also achieves F/2.2.
The facial recognition feature is just a nice cherry on top.
BATTERY AND CHARGING Realme C21 64 GB |
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Battery Capacity (Battery Size) | 5000 mAh | Better than 99 % of phones rated. |
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The battery size of Realme C21 64 GB is 5000 mAh. Nevertheless, battery capacity is not the only factor that affects the phone's battery life. For example - the size of the display, the performance of the processor, the use of data functions and, of course, the intensity of use of phone in general all have a significant impact on battery life. Standard for most smartphones today is a battery capacity of around 4500 to 5000 mAH. Phones with this battery size usually guarantee a phone life of at least 1 day. Older or cheaper smartphone models can then reach battery capacities typically around 2500 mAH and below. With this capacity, you may find that if you use your phone heavily, you may need to recharge your phone during the day.
Show moreCELLULAR Realme C21 64 GB |
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Technology | WCDMA (UMTS) / GSM | |
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Mobile Broadband Generation | 4G | Better than 88 % of phones rated. |
Operating System | Android 10 | |
User Interface | Realme UI | |
Navigation | GPS, A-GPS, GLONASS, BeiDou |
Standard 4G connectivity is currently being replaced by 5G, but is still the preserve of the latest phones. Realme C21 64 GB supports 4G. 3G connectivity is now only found in the oldest phones. The operating system in the case of this model is Android 10.
Show moreCOMMUNICATIONS Realme C21 64 GB |
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Data Transmission | FDD-LTE, TDD-LTE | |
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2G Band | 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 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 | |
Wireless Interface | IEEE 802.11b/g/n | |
Bluetooth | Bluetooth 5.0 |
Bluetooth 5.0 must not be missing from the basic package. It makes it easy to connect wireless headphones to your phone, connect your phone to your TV, tablet, speaker and more.
Show moreFEATURES Realme C21 64 GB |
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Phone Functions | Speakerphone, voice control, call timer, conference call, flight mode, voice dialing, vibrating alert | |
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Sensors | Accelerometer, proximity sensor, magnetometer, light sensor | |
Security Devices | Fingerprint reader | |
Additional Phone Features | Super power saving mode, HyperEngine technology, Reverse charging |
OTHERS Realme C21 64 GB |
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Included Accessories | USB cable, power adapter, SIM card removal tool | |
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Compliant Standards | TUV Rheinland |
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