Karbonn K4 mobile was launched in December 2011. The phone comes with a 2.40-inch display offering a resolution of 240x320 pixels. Karbonn K4 is powered by an one-core processor. The Karbonn K4 runs Proprietary and is powered by a 2200mAh removable battery.
As far as the cameras are concerned, the Karbonn K4 on the rear packs 1.3-megapixel camera.
Karbonn K4 is based on Proprietary, and supports storage expansion via microSD card (up to 8GB). The Karbonn K4 is a dual-SIM (GSM and GSM) mobile that accepts Regular and Regular cards. The Karbonn K4 measures 116.50 x 50.00 x 14.80mm (height x width x thickness) and weighs 116.00 grams. It was launched in Black and Red colours.
Connectivity options on the Karbonn K4 include FM radio.
| Alternate names | K4 Jumbo Plus |
| Brand | Karbonn |
| Model | K4 |
| Release date | December 2011 |
| Form factor | Bar |
| Dimensions (mm) | 116.50 x 50.00 x 14.80 |
| Weight (g) | 116.00 |
| Battery capacity (mAh) | 2200 |
| Removable battery | Yes |
| Colours | Black, Red |
| Screen size (inches) | 2.40 |
| Touchscreen | No |
| Resolution | 240x320 pixels |
| Processor | one-core |
| Processor make | |
| Expandable storage | Yes |
| Expandable storage type | microSD |
| Expandable storage up to (GB) | 8 |
| Rear camera | 1.3-megapixel |
| Rear flash | No |
| Front camera | No |
| Operating system | Proprietary |
| Wi-Fi | No |
| GPS | No |
| Bluetooth | Yes |
| NFC | No |
| Infrared | No |
| USB OTG | No |
| FM | Yes |
| Number of SIMs | 2 |
| Wi-Fi Direct | No |
| Mobile High-Definition Link (MHL) | No |
| SIM 1 | |
| SIM Type | Regular |
| GSM/CDMA | GSM |
| 3G | No |
| 4G/ LTE | No |
| Supports 4G in India (Band 40) | No |
| SIM 2 | |
| SIM Type | Regular |
| GSM/CDMA | GSM |
| 3G | No |
| 4G/ LTE | No |
| Supports 4G in India (Band 40) | No |
| Compass/ Magnetometer | No |
| Proximity sensor | No |
| Accelerometer | No |
| Ambient light sensor | No |
| Gyroscope | No |
| Barometer | No |
| Temperature sensor | No |
Karbonn K4
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