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Realme C21
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Battery: 5000 mAh
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RAM: 3GB, 4GB
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Storage: 32GB, 64GB
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Display: IPS LCD, 6.5 inches
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Camera: Rear 13 MP+2 MP+2 MP, and Front 5MP
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OS: Android 10, Realme UI
Full Specifications
General
| Model | Realme C21 |
| Announced | 2021, March 05 |
| Released | 2021, March 05 |
| Status | Available |
Price
| Official | 10,990 BDT 3GB/32GB, 11,990 BDT 4GB/64GB Approx. |
Design
| Dimensions The Dimensions section shows the phone’s physical size in Height × Length × Width (H × L × W) format, along with its volume, when available. For flip phones, the dimensions are measured with the flip closed. This information helps users understand the phone’s overall size, thickness, portability, and how comfortably it may fit in the hand or pocket. | 165.2 x 76.4 x 8.9 mm (6.50 x 3.01 x 0.35 in) |
| Weight The Weight section shows the total weight of the phone, usually measured in grams (g). It helps users understand how light or heavy the device feels during everyday use and carrying. For phones with different designs or configurations, the listed weight may vary depending on the materials, battery, and other hardware components. | 190 g (6.70 oz) |
| SIM The SIM section provides details about the phone’s supported SIM configuration, including SIM type, number of SIM slots, and eSIM support, where available. It may specify options such as Nano-SIM, Single SIM, Dual SIM, or Hybrid Dual SIM. This information helps users understand how the phone handles multiple mobile numbers and which SIM format is required. For Dual SIM devices, the section may also indicate whether both SIMs can remain active simultaneously and support mobile network connectivity. | Dual SIM (Nano-SIM, dual stand-by) |
| Colors | Cross Black, Cross Blue |
Display Specification
| Display Type The Display Type section identifies the technology used for the phone’s screen, such as IPS LCD, AMOLED, OLED, or LTPO AMOLED. It helps users understand the display’s overall visual quality, including color reproduction, contrast, brightness, viewing experience, and power efficiency. The display type is an important specification when comparing smartphone screens. | IPS LCD, 400 nits |
| Size The Display Size section shows the diagonal size of the phone’s screen, usually measured in inches. It helps users understand the available viewing area and overall screen experience. A larger display is generally better for watching videos, gaming, and browsing, while a smaller display can offer easier handling and portability. | 6.5 inches, 102.0 cm2 (~80.8% screen-to-body ratio) |
| Resolution | 720 x 1600 pixels, 20:9 ratio |
| Pixel Density Pixel Density (PPI) is refers to the concentration of pixels on a particular display, measured in pixels per inch (ppi). Pixel density is calculated by dividing the diagonal pixel resolution of a display by its diagonal size, higher pixel density better display quality. | 270 ppi density |
Storage
| Card Slot The Storage Card Slot section indicates whether the phone supports an external memory card, such as a microSD card, for expanding storage. It shows users whether they can add extra space for apps, photos, videos, and other files beyond the phone’s built-in storage. If the phone does not support a memory card, it will be listed as Not Supported. | microSDXC (dedicated slot) |
| Internal Storage The Internal Storage section shows the built-in storage capacity available on the phone, usually measured in GB. It determines how much space is available for apps, photos, videos, documents, and other files. Phones may come with different storage options, such as 128GB, 256GB, or 512GB, depending on the model and variant. |
32GB 3GB RAM, 64GB 4GB RAM eMMC 5.1 |
Main Camera
| Camera Setup | Dual |
| Resolution |
13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) |
| Features | LED flash, HDR, panorama |
| Video | 1080p@30fps |
Selfie Camera
| Camera Setup | Single |
| Resolution | 5 MP, f/2.2, (wide), 1/5.0", 1.12µm |
| Video | 1080p@30fps |
| Features | HDR, panorama |
Platform
| Operating System The Operating System (OS) section shows the software platform that powers the phone and manages its hardware, apps, and system features. It typically includes the OS name and version, such as Android or iOS, and may also mention the manufacturer’s custom user interface. This information helps users understand the phone’s software experience, features, compatibility, and available updates. | Android 10, Realme UI |
| Chipset Chipset is a group of integrated circuits designed to perform one or a more dedicated functions, often with real time computing constraints, Popular smartphones are equipped with more advanced embedded chipsets that can do many different tasks depending on their programming. | Mediatek MT6765G Helio G35 (12 nm) |
| CPU CPU (Central Processing Unit) mostly known as processors, CPU processes instructions in order to carry out certain functions that make your device operate properly. Processors are often described as the brain of computers, smartphones and tablets, Smartphones and tablets rely on processors to carry out their every task, Processors are an incredibly important factor in selecting any type of computing device, including your smartphone. | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) |
| GPU GPU (Graphics Processing Unit) is a single-chip processor designed to rapidly manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display, This includes things such as lighting effects, object transformations, and 3D motion. | PowerVR GE8320 |
Battery
| Battery Type The Battery Type section identifies the technology and design of the phone’s built-in battery, such as Li-Ion (Lithium-Ion) or Li-Po (Lithium-Polymer). It helps users understand the type of battery used to power the device and provides a basic overview of its battery technology. | Li-Ion (Lithium Ion) |
| Capacity The Battery Capacity section shows the amount of electrical charge the phone’s battery can store, usually measured in mAh (milliampere-hours). A higher capacity generally provides more energy for everyday use, although actual battery life also depends on the display, processor, software, network usage, and other hardware components. | 5000 mAh |
| Removable | No |
| Charging |
10W wired Reverse wired |
| Wireless Charging Wireless Charging (Inductive Charging) uses an electromagnetic field to transfer energy between two objects. This is usually done with a charging station. Energy is sent through an inductive coupling to an electrical device, which can then use that energy to charge batteries or run the device. | No |
Multimedia
| Loudspeaker The Loudspeaker section indicates the type and configuration of the phone’s built-in speakers, such as single or stereo speakers. It helps users understand the device’s audio output for calls, music, videos, gaming, and other multimedia activities. Some phones may also include additional audio features for a better listening experience. | Yes |
| Audio Jack The Audio Jack section indicates whether the phone includes a dedicated 3.5mm headphone jack for connecting wired headphones, earphones, or external audio devices. If the phone does not have a traditional audio jack, users may need USB Type-C headphones or an adapter for wired audio. The specification helps users quickly check the phone’s compatibility with their preferred audio accessories. | Yes |
Sensors
| Fingerprint | Yes (rear-mounted) |
| Other Sensors | accelerometer, proximity, compass |
Network & Connectivity
| Technology | GSM / HSPA / LTE |
| Speed | HSPA, LTE |
| Wi-fi The Wi-Fi section shows the wireless networking technologies and standards supported by the phone for connecting to the internet and other compatible devices. It may include standards such as Wi-Fi 4, Wi-Fi 5, Wi-Fi 6, Wi-Fi 6E, or Wi-Fi 7, along with features like dual-band, tri-band, Wi-Fi Direct, and hotspot support, where available. This information helps users understand the phone’s wireless connectivity, network compatibility, speed capabilities, and connection features. | Wi-Fi 802.11 b/g/n |
| Bluetooth The Bluetooth section shows the wireless communication technology and version supported by the phone, such as Bluetooth 5.0, 5.1, 5.2, 5.3, or 5.4. It enables the phone to connect wirelessly with headphones, speakers, smartwatches, keyboards, cars, and other compatible devices. Where available, this section may also mention features such as A2DP, LE, aptX, or other Bluetooth audio and connectivity technologies. | 5.0, A2DP, LE |
| NFC The NFC (Near Field Communication) section indicates whether the phone supports short-range wireless communication between compatible devices. NFC can be used for contactless payments, quick device pairing, data sharing, access cards, and other NFC-enabled services, depending on the phone and region. This specification helps users check whether the device supports convenient tap-to-connect and contactless features. | No |
| Positioning | GPS, GLONASS, BDS |
| FM Radio | Yes |
| USB | microUSB 2.0, OTG |
| 2G Network The 2G Network section shows whether the phone supports second-generation mobile networks, including GSM, GPRS, and EDGE technologies. It provides basic connectivity for voice calls, SMS, and limited mobile data services where 2G networks are available. | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network The 3G Network section indicates the phone’s compatibility with third-generation mobile networks, such as UMTS, HSPA, and HSPA+. 3G provides faster mobile data than 2G and supports services such as web browsing, video calling, and multimedia streaming. | HSDPA 850 / 900 / 2100 |
| 4G Network The 4G Network section shows whether the phone supports fourth-generation mobile networks, primarily LTE technology. 4G offers faster mobile internet speeds, lower latency, and improved performance for browsing, streaming, online gaming, and other data-intensive activities. |
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International 1, 3, 5, 8, 38, 40, 41 - India |
PROS
- Long-lasting battery life
- Stable performance for daily use
- Reverse charging support
- Affordable and durable design
- FM radio and 3.5mm headphone jack
CONS
- HD+ resolution only
- Slow 10W charging
- Basic camera performance
- Outdated Android version out of the box
About the Realme C21:
The Realme C21 is a budget-friendly smartphone launched in March 2021, targeting users who need a reliable device for daily use with good battery life and a simple Android experience. It features a 6.5-inch IPS LCD display with HD+ resolution and a tall 20:9 aspect ratio, making it comfortable for watching videos, browsing social media, and reading. The display offers up to 400 nits of brightness, which is decent for indoor and moderate outdoor usage.
The phone is powered by the MediaTek Helio G35 chipset, which is built on a 12nm process and designed for entry-level performance. Paired with 3GB or 4GB RAM, the Realme C21 can handle basic multitasking, calling, messaging, Facebook, YouTube, and light gaming without major issues. Storage options include 32GB and 64GB, and users can expand storage easily using the dedicated microSD card slot.
For photography, the Realme C21 comes with a dual rear camera setup, led by a 13MP main camera and a 2MP macro sensor. The camera delivers acceptable photos in good lighting conditions. The 5MP front camera is suitable for selfies and video calls. Both front and rear cameras support 1080p video recording.
Battery life is one of the strongest points of the Realme C21. It packs a 5000mAh battery that can easily last a full day or more on normal usage. The phone supports 10W charging and also offers reverse wired charging, which is useful in emergencies. With a rear-mounted fingerprint sensor and classic design, the Realme C21 remains a practical option in the budget segment.
Main Key Features
- 6.5-inch IPS LCD HD+ display
- MediaTek Helio G35 processor
- 13MP dual rear camera
- 5MP selfie camera
- 5000mAh battery
- Reverse wired charging
- Rear-mounted fingerprint sensor
- Dedicated microSD card slot
Why Choose This Phone?
The Realme C21 is a good choice for users who want a simple, dependable smartphone for everyday tasks. It is suitable for students, elderly users, and budget buyers who prioritize battery life, reliability, and essential features over performance and advanced technology.
Opinions:
In my opinion, the Realme C21 is a solid entry-level smartphone that focuses on essentials. While it does not offer premium features, it delivers good battery life and stable performance, making it a practical choice for basic smartphone users.
Check Other Models of Realme:
FAQs about Realme C21
Q: Does the Realme C21 support 5G?
A: No, the Realme C21 supports only 4G LTE networks.
Q: Is the Realme C21 good for gaming?
A: It is suitable for light gaming but not for heavy or high-end games.
Q: Does the Realme C21 have fast charging?
A: No, it supports standard 10W charging.
Q: How long does the battery last?
A: The 5000mAh battery can easily last more than one day with normal usage.
Q: Is the Realme C21 worth buying now?
A: Yes, if you want a low-cost phone with good battery life and essential features.
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