Karbonn
Side-by-side technical data
Karbonn A21 vs Karbonn Smart A12 Star
Compare up to four phones using typed, normalized technical data. Measurements stay numeric, capabilities stay boolean, and options stay comparable.
The verdict
Neither runs away with it: each wins something.
Which one is for you?
Karbonn A21, if you care about…
- Battery Capacity
- 1,800 mAh
- against 1,400 mAh
- Bluetooth Version
- Bluetooth 2.1
- against Bluetooth 2.0
- Display Diagonal
- 4.5″
- against 4″
Karbonn Smart A12 Star, if you care about…
- Display Technology
- IPS LCD
- against TFT LCD
- Display Pixel Density
- 233 ppi
- against 207 ppi
- Standby time
- 300 h
- against 200 h
Specification comparison
Battery
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 1,800 mAh Best value | 1,400 mAh |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | — | — |
| Battery Features | — | — |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | 5 h | — |
| Standby time | 200 h | 300 h Best value |
| Music playback time | — | — |
Design
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Body Colors | White | Black |
| Body Thickness | — | 10.1 mm |
| Body Width | — | 64.2 mm |
| Body Height | — | 124.2 mm |
| Weight | — | 130 g |
| Usable Surface | — | 57.1 % |
| Body Materials | — | — |
| Resistance Features | — | — |
| Waterproof Depth | — | — |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | — | — |
| QWERTY keyboard | — | — |
Performance
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Processor Model | — | — |
| Processor Process Size | — | — |
| Graphics GPU | — | — |
| Storage Type | — | — |
| Maximum CPU Clock | 1.2 GHz | 1.2 GHz |
| Maximum Storage Capacity | 4 GB | 4 GB |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | Dual-core 1.2 GHz | Dual-core 1.2 GHz |
| Processor Type | Dual-Core | Dual-Core |
| 64-Bit Processor | — | — |
| RAM Capacity | 500 MB | 512 MB Best value |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Display Aspect Ratio | 5:3 | 5:3 |
| Peak Display Brightness | — | — |
| Display Technology | TFT LCD | IPS LCD Best value |
| Display Diagonal | 4.5″ Best value | 4″ |
| Display Horizontal Resolution | 480 px | 480 px |
| Display Vertical Resolution | 800 px | 800 px |
| Display Pixel Density | 207 ppi | 233 ppi Best value |
| Display Refresh Rate | — | — |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | — | — |
| Integrated Projector | No | No |
| Projector Brightness | — | — |
| Projector Horizontal Resolution | — | — |
| Projector Vertical Resolution | — | — |
| Cover display diagonal | — | — |
| Cover display refresh rate | — | — |
| Cover display peak brightness | — | — |
| Display colors | 256K colors | — |
Sensor
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Sensor Features | Accelerometer, Proximity Sensor | Accelerometer, Proximity Sensor |
Software
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Operating System | Android 4.0 | Android 4.4 |
| OS Family | Android | Android |
| OS Version | 4 | 4 |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | — | — |
| Java (J2ME) | — | — |
Connectivity
| Specification | A21 | Smart A12 Star |
|---|---|---|
| SIM Configurations | Dual Mini-SIM | Dual Micro-SIM, Dual SIM Dual Standby |
| Cellular Bands | 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS 2100 | 2G GSM 900, 2G GSM 1800, 3G UMTS 2100 |
| Cellular Technologies | GSM, HSPA | GSM, HSPA |
| Wi-Fi Standards | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11 b/g/n |
| Wi-Fi Features | Wi-Fi 802.11 b/g/n | Wi-Fi Hotspot |
| Bluetooth Version | Bluetooth 2.1 Best value | Bluetooth 2.0 |
| Bluetooth Profiles | A2DP | — |
| Navigation Systems | GPS | GPS |
| Connectivity Features | 3.5 mm Audio Jack, microUSB | 3.5 mm Audio Jack, FM Radio, microUSB |
| USB Version | microUSB | microUSB |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | 0.44 W/kg Best value | 0.79 W/kg |
| SAR (EU) body | — | — |
| Messaging | — | — |
Audio
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | A2DP, Loudspeaker | Loudspeaker |
| Alert types | — | — |
Technical
| Specification | A21 | Smart A12 Star |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | A21 | Smart A12 Star |
|---|---|---|
| Built-in functions | — | — |
