Karbonn
Side-by-side technical data
Karbonn KT21 Express 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 Smart A12 Star, if you care about…
- Battery Capacity
- 1,400 mAh
- against 1,000 mAh
- Display Technology
- IPS LCD
- against TFT LCD
- Display Diagonal
- 4″
- against 2.8″
- Display Horizontal Resolution
- 480 px
- against 240 px
Specification comparison
Battery
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 1,000 mAh | 1,400 mAh Best value |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | — | — |
| Battery Features | — | — |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | — | — |
| Standby time | — | 300 h |
| Music playback time | — | — |
Design
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Body Colors | Black | 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 | KT21 Express | Smart A12 Star |
|---|---|---|
| Processor Model | — | — |
| Processor Process Size | — | — |
| Graphics GPU | — | — |
| Storage Type | — | — |
| Maximum CPU Clock | — | 1.2 GHz |
| Maximum Storage Capacity | — | 4 GB |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | — | Dual-core 1.2 GHz |
| Processor Type | — | Dual-Core |
| 64-Bit Processor | — | — |
| RAM Capacity | — | 512 MB |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Display Aspect Ratio | 4:3 | 5:3 |
| Peak Display Brightness | — | — |
| Display Technology | TFT LCD | IPS LCD Best value |
| Display Diagonal | 2.8″ | 4″ Best value |
| Display Horizontal Resolution | 240 px | 480 px Best value |
| Display Vertical Resolution | 320 px | 800 px Best value |
| Display Pixel Density | — | 233 ppi |
| 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 | — | — |
Sensor
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Sensor Features | Proximity Sensor | Accelerometer, Proximity Sensor |
Software
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Operating System | — | Android 4.4 |
| OS Family | — | Android |
| OS Version | — | 4 |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | — | — |
| Java (J2ME) | Yes | — |
Connectivity
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| SIM Configurations | Dual Mini-SIM | Dual Micro-SIM, Dual SIM Dual Standby |
| Cellular Bands | — | 2G GSM 900, 2G GSM 1800, 3G UMTS 2100 |
| Cellular Technologies | EDGE, GPRS | GSM, HSPA Best value |
| Wi-Fi Standards | — | Wi-Fi 802.11 b/g/n |
| Wi-Fi Features | — | Wi-Fi Hotspot |
| Bluetooth Version | Bluetooth 2.0 | Bluetooth 2.0 |
| Bluetooth Profiles | — | — |
| Navigation Systems | — | GPS |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, microUSB | 3.5 mm Audio Jack, FM Radio, microUSB |
| USB Version | microUSB | microUSB |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | 0.79 W/kg |
| SAR (EU) body | — | — |
| Messaging | SMS, MMS, Email | — |
Audio
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | Loudspeaker | Loudspeaker |
| Alert types | — | — |
Technical
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | KT21 Express | Smart A12 Star |
|---|---|---|
| Built-in functions | Audio/video player, Photo viewer, Organizer | — |
