Karbonn KT21

Karbonn
Last Updated: 19th September 2025

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Key Specs

Display 2.80-inch
Processor one-core
Front Camera No
Rear Camera 3.2MP
Battery Capacity 1000mAh
OS Proprietary

Market Status Released

Release Date March 2012

Karbonn KT21 Review

Design
Display
Software
Performance
Battery Life
Camera
Value for Money

Good
Big display
User Interface

Bad
Poor signal reception
Poor touch response

Karbonn is known to introduce feature rich, affordable handsets and they have tried to do the same with their latest offering Karbonn KT21. Karbonn KT21 is a dual-SIM touch and type phone that comes with the promise of various multimedia and utility features. With an emerging set of affordable touch and type devices, will this handset be able to stand out? We figure out in this review.

Hardware/ Design
At the first glance, we found the Karbonn KT21 to be a good-looking handset at the price it's being offered. It's light and comfortable to hold. Unlike most touch and type phones, Karbonn KT-21 sports a big 2.8-inch display.

Read complete Karbonn KT21 Review

Karbonn KT21 Summary

Karbonn KT21 mobile was launched in March 2012. The phone comes with a 2.80-inch touchscreen display. Karbonn KT21 is powered by an one-core processor. The Karbonn KT21 runs Proprietary and is powered by a 1000mAh removable battery.

As far as the cameras are concerned, the Karbonn KT21 on the rear packs 3.2-megapixel camera.

Karbonn KT21 is based on Proprietary, and supports storage expansion via microSD card (up to 32GB). The Karbonn KT21 is a dual-SIM (GSM and GSM) mobile that accepts Regular and Regular cards. It was launched in Black colour.

Connectivity options on the Karbonn KT21 include FM radio. Sensors on the phone include accelerometer and proximity sensor.

Karbonn KT21 Full Specifications

General

Brand	Karbonn
Model	KT21
Release date	March 2012
Form factor	Bar
Battery capacity (mAh)	1000
Removable battery	Yes
Colours	Black

Display

Screen size (inches)	2.80
Touchscreen	Yes

Hardware

Processor	one-core
Processor make
Expandable storage	Yes
Expandable storage type	microSD
Expandable storage up to (GB)	32

Camera

Rear camera	3.2-megapixel
Rear flash	Yes
Front camera	No

Software

Operating system

Proprietary

Connectivity

Wi-Fi	No
GPS	No
Bluetooth	Yes
NFC	No
Infrared	No
USB OTG	No
Headphones	3.5mm
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