Display

The Karbonn A21 features a 4.5 inch display which a little larger than an average phone released in 2013
The density of pixels per square inch of screen decides the display sharpness of a device. With a resolution of 207 PPI, the device is 53% sharper than typical phones released in 2013.

Battery Life

It is said that the Karbonn A21 can last up to 5 hours of talk time which is far less than the 2013 average of 8 hours. Talking about the power life of the device, which is mostly decided by battery capacity, it packs 1800 mAh which is just above average compared to 1626.8478985991 mAh of other smartphones released in 2013.

Processor and Memory

The Karbonn A21 is backed by Dual Core on a chip. Its CPU is clocked at 1.2 GHz, which is significantly faster than an average smartphone processor.

Camera

The Karbonn A21 packs a 5 megapixel camera on the back, making it potential in capturing very nice photos.

Storage

Most basic version of the Karbonn A21 comes with 4 GB of built-in storage. which is not preferable for storing files and multimedia. Good news is that it is easy and cheap to expand the device's storage by as much as %0% %1% with a microSD card.