
The Karbonn K309 Boombastic is a compact, lightweight dual SIM GSM phone with a 176 x 220 pixel TFT display, VGA camera, and a removable 1500 mAh battery. It is designed for basic calling and SMS with long battery life and easy data charging via microUSB.
7/2/2026
| Identity Brand | Karbonn |
| Identity Model | Karbonn K309 Boombastic |
| Launch Announced | 2012 |
| Launch Status | Discontinued |
| Body Dimensions | 113 x 49 x 15.2 mm (4.45 x 1.93 x 0.60 in) |
| Body Weight | 85 g (3.00 oz) |
| SIM SIM | Dual SIM (Mini-SIM) |
| Display Type | TFT, 65K colors |
| Display Size | , - |
| Display Resolution | 176 x 220 pixels |
| Camera Rear | Single: VGA |
| Battery | Li-Ion 1500 mAh, removable |
| Network Technology | GSM |
| Network 2G bands | GSM 900 / 1800 - SIM 1 & SIM 2 |
| Connectivity Network | GSM |
| Connectivity Wireless | No | 2.0 |
| Connectivity USB | microUSB |
The Karbonn K309 Boombastic is a dual SIM GSM phone designed to offer easy communication with a compact and lightweight design. Measuring 113 x 49 x 15.2 mm and weighing only 85 grams, this phone is comfortable to hold and easy to carry without weighing down your pocket.
The small TFT screen with a resolution of 176 x 220 pixels can display up to 65,000 colors. Although not large, the display is sufficient for basic needs such as calling, sending SMS, and clearly viewing menus. The screen technology provides fairly vivid colors for a feature phone.
In terms of performance, the Karbonn K309 Boombastic relies on 2G GSM networks with dual SIM support, allowing users to manage two phone numbers simultaneously—ideal for separating personal and work needs. Data connectivity is limited to 2G, but basic features like microUSB 2.0 are available for data transfer and charging.
For photography needs, this phone is equipped with a simple VGA rear camera. It is adequate for capturing basic moments at low resolution, suitable for users who do not prioritize camera features.
One of the advantages of the Karbonn K309 Boombastic is its battery life. Equipped with a removable 1500 mAh Li-Ion battery, the phone can last quite long during daily use, especially for calls and SMS. Charging is done via a common microUSB port that is easy to find.
Ideal for: Those who need a simple phone with long battery life, dual SIM functionality, and basic calling and SMS features without complex multimedia functions.