| Brand: | Karbonn |
| Model: | A21 |
| Release Date: | 2012 |
| Size: | 4.5 inches, 57.6 cm2 |
| Resolution: | 480 x 800 pixels, 5:3 ratio (~207 ppi density) |
| Technology: | TFT, 256K colors |
| Main Specs: | 5 MP, AF |
| Main Features: | LED flash |
| Main Video: | Yes |
| Selfie Specs: | 1.3 MP |
| Capacity: | Li-Ion 1800 mAh, removable |
| Type: | Li-Ion |
| Ram: | 512MB |
| Storage: | 4GB |
| Expandable: | microSDHC (dedicated slot) |
| Os Version: | 4.0 |
| Dimensions: | - |
| Weight: | - |
| Wifi: | Wi-Fi 802.11 b/g/n |
| Bluetooth: | 2.1, A2DP |
| Nfc: | No |
| Usb: | microUSB 2.0 |
| Headphone Jack: | Yes |
| Network: | GSM / HSPA |
| Sensors: | Accelerometer, proximity |
| Colors: | Pearl White |
