Karbonn A21
$50
Overview
Karbonn A21 is a budget Android smartphone released in 2012 with a 4.5-inch TFT, Snapdragon 8 chipset, 5 main camera, and 1800 mAh battery.
Priced at $50, it targets users seeking budget performance.
Specifications of Karbonn A21
The display of Karbonn A21 measures 4.5 inches with TFT technology and 120Hz refresh rate. Peak brightness reaches 300 nits for excellent outdoor visibility. The screen renders at 480x800 pixels resolution.
The camera system of Karbonn A21 features 1 rear cameras: 5 main. Video recording supports up to 2160p.
The battery of Karbonn A21 has 1800mAh capacity with 5.0 wired charging. A full charge takes approximately 240 min minutes.
The performance of Karbonn A21 is powered by the Snapdragon 8 chipset. Geekbench scores reach 150 single-core and 450 multi-core. AnTuTu benchmark achieves 20000.
The memory of Karbonn A21 offers 16GB RAM with 4GB storage options. RAM uses LPDDR5X technology. Storage is 4GB 512MB RAM.
The connectivity of Karbonn A21 includes 5G support, Wi-Fi Wi-Fi 802.11 b/g/n, and Bluetooth 2.1.
The build of Karbonn A21 weighs 196g with Plastic frame and glossy-plastic back. Dimensions measure 157.5 x 74.3 x 7.6 mm.
The software of Karbonn A21 runs Android 4.0 (Ice Cream Sandwich) with Origin OS.
Compare Karbonn A21
Frequently Asked Questions about Karbonn A21
Karbonn A21 has a 5 camera suitable for casual photography. For professional photography, consider phones with higher-resolution sensors.
Yes, Karbonn A21 is excellent for gaming with its Snapdragon 8 chipset and 120Hz display. It handles demanding games at high settings with smooth frame rates.
Yes, Karbonn A21 supports 5G connectivity with both Sub-6GHz and mmWave bands for maximum network compatibility and fastest speeds. It works with major 5G carriers globally.
Karbonn A21 has a 1800mAh battery. Battery life varies based on usage patterns.
Karbonn A21 at $50 is a budget device offering Snapdragon 8. It's worth buying if you prioritize affordability over premium features.
Karbonn A21 supports 5.0 wired charging with full charge in approximately 240 min minutes.
Karbonn A21 is available in 4GB storage options. Storage is not expandable, so choose your capacity based on your needs.
Karbonn A21 has a 4.5-inch TFT with 120Hz refresh rate and 300 nits peak brightness. HDR support includes Yes.
Karbonn A21 in Category Rankings
See how Karbonn A21 ranks in these categories:
Verdict
The Karbonn A21 delivers practical value for users prioritizing affordability over premium features. The phone excels in smooth 120Hz display. Pick this phone for essential smartphone functionality, if you prioritize affordability while still needing core features.
Key Specifications
Display
4.5"
Main Camera
5
Chipset
Snapdragon 8
Full Specifications
Network
| Technology | GSM / HSPA |
| 2G Bands | GSM / |
| 3G Bands | HSDPA 2100 |
| 4G LTE Bands | LTE / |
| 5G Sub-6 Bands | 5G |
| 5G mmWave Bands | [] |
| Speed | N/A |
| Carrier Aggregation | |
| SIM | Mini-SIM |
| Dual SIM Mode | Dual SIM |
| eSIM Support | |
| VoLTE Support | N/A |
| VoWiFi | N/A |
| NR CA Support |
Launch
| Announced | 2012 |
| Status | Upcoming |
| Availability | N/A |
| Model Variants | N/A |
| Launch Price | $528.51 |
Body & Design
| Dimensions (mm) | 157.5 x 74.3 x 7.6 mm |
| Weight (g) | 196 |
| Build Materials | Plastic |
| Frame | Plastic |
| Back Finish | glossy-plastic |
| Colors | ["Pearl White"] |
| IP Rating | N/A |
| Rugged Certifications | N/A |
| Ingress Gaskets | N/A |
| Form Factor | Bar |
| Hinge Type | N/A |
| Folded Dimensions | N/A |
| Thermal Solution | Passive |
| Notification/Alert | |
| Haptics | Basic |
Display
| Panel Type | TFT |
| Size (inches) | 4.5 |
| Resolution (px) | 480x800 pixels |
| Aspect Ratio | 126:275 |
| Pixel Density (ppi) | 459 |
| Screen-to-body Ratio (%) | 65.0 |
| Refresh Rate (Hz) | 120 |
| Adaptive Refresh Rate | |
| Touch Sampling Rate (Hz) | 120 |
| Peak Brightness (nits) | 300 |
| HDR Standards | |
| Color Gamut | sRGB |
| Color Depth | 16 |
| PWM Dimming (Hz) | N/A |
| Glass Protection | N/A |
| Oleophobic Coating | N/A |
| Curvature | Flat |
| Always-on Display | |
| Display Driver IC | N/A |
| Cover Display |
Platform (SoC)
| OS at Launch | Android 4.0 (Ice Cream Sandwich) |
| Update Policy | N/A |
| Chipset | Snapdragon 8 |
| CPU | Dual-core 1.2 GHz |
| GPU | N/A |
| NPU/AI TOPs | N/A |
| ISP Features | Basic |
| Modem | snapdragon-8-2012 |
| Wi-Fi/Bluetooth Chip | N/A |
| Throttling Behavior | N/A |
| Geekbench Single-Core | 150 |
| Geekbench Multi-Core | 450 |
| AnTuTu Score | 20000 |
| 3DMark Scores | N/A |
Memory & Storage
| RAM | 16GB |
| RAM Type | LPDDR5X |
| Storage | 4GB |
| Storage Type | 4GB 512MB RAM |
| Storage Speed | emmc-4.5 |
| Expandable Storage | microSDHC (dedicated slot) |
| Slot Type | microSD |
| USB OTG | |
| Filesystem Encryption | basic |
Main Camera System
| Rear Cameras | 1 |
| Main Sensor | 5 |
| Main Sensor Size | 1/4 inch |
| Main Sensor Model | Sony ISOCELL |
| Main Lens | f/2.8, 30mm |
| OIS | |
| Autofocus | AF |
| Pixel Binning | |
| Ultrawide | N/A |
| Telephoto | N/A |
| Macro | N/A |
| Depth/ToF/LiDAR | |
| Flicker/Color Sensors | N/A |
| Flash | LED |
| Video Resolution | 2160p |
| HDR/Dolby Vision Video | |
| Video Codecs | h264 |
| Slow Motion | |
| Video Stabilization | eis-basic |
| Night Mode Features | |
| RAW/Pro Controls | N/A |
Selfie Camera
| Resolution | 1.3 |
| Sensor Size | 1/5 inch |
| Aperture | f/2.8 |
| AF/OIS | |
| Secondary Front Cam | |
| Front Flash | |
| Video | 480p |
| HDR/Dolby Vision | N/A |
| Face Unlock | Software |
Audio
| Loudspeakers | |
| 3.5mm Jack | |
| Hi-Res Audio | |
| Spatial Audio / Dolby Atmos | |
| Microphones | 1 |
| Bluetooth Codecs | mp3-aac |
| DAC/Amp | Basic |
Connectivity
| Wi-Fi | Wi-Fi 802.11 b/g/n |
| Wi-Fi Features | Wi-Fi 802.11 b/g/n |
| Bluetooth | 2.1 |
| NFC | |
| IR Blaster | |
| UWB | N/A |
| Positioning | GPS |
| Dual-Band GNSS | |
| FM Radio | |
| USB | Micro-USB |
| Display Out | |
| eSIM Capacity |
Sensors
| Fingerprint Sensor | N/A |
| 3D Face ID | N/A |
| Accelerometer | |
| Gyroscope | |
| Magnetometer | |
| Proximity Sensor | |
| Ambient Light | |
| Barometer | |
| Thermo/Hygrometer | N/A |
| UV Sensor | N/A |
| Hall Sensor | |
| Color Temp Sensor | |
| Health Sensors | N/A |
| Satellite SOS |
Battery & Charging
| Capacity (mAh) | 1800 |
| Type | Li-Ion |
| Removable | |
| Endurance Rating | N/A |
| Wired Charging | 5.0 |
| Wired Standard | micro-usb |
| 0-50% Time (mins) | 120 min |
| Full Charge Time | 240 min |
| Wireless Charging | N/A |
| Wireless Standard | N/A |
| Reverse Wireless | N/A |
| Reverse Wired | |
| Charger in Box | 5w-charger |
| Battery Health Features | Basic |
Software
| OS at Launch | Android 4.0 (Ice Cream Sandwich) |
| Update Window | N/A |
| UI Skin / Launcher | Origin OS |
| Feature Drops | N/A |
| App Cloning | N/A |
| Game Mode | |
| Privacy Features | Basic |
| Accessibility | Basic |
| Satellite Messaging UI |
Miscellaneous
| In-Box Contents | charger-cable-manual |
| Recycled Materials (%) | N/A |
| Repairability Score | N/A |
| Warranty | N/A |
Reviews & Ratings
186 ratings
Showing 3 of 186 reviews
Alex R.
2 weeks ago
Absolutely love the camera on this phone! The zoom is incredible and the photos are so crisp. Battery life is also a huge plus.
Ben C.
1 month ago
Great performance and beautiful display. My only complaint is that it feels a bit heavy, but you get used to it. Solid phone overall.
Chloe D.
3 months ago
The best phone I've ever owned. It's fast, the software is clean, and the build quality is top-notch. Highly recommend!
Karbonn A21 Review: Solid Performance for the Price
Our comprehensive review of the Karbonn A21 covers display quality, camera performance, battery life, and overall value. A solid choice in its price segment.
- + Powerful Snapdragon 8 chipset for smooth performance
- + Excellent value for money
- - Display could be brighter or smoother
- - Camera performance is average