Karbonn A4

The Karbonn A4 is a budget-friendly Android smartphone that was released in March 2013. It runs on the Android 2.3.6 (Gingerbread) operating system and has basic features suitable for everyday use.

The phone has a small 4-inch TFT display with a resolution of 320 x 480 pixels, giving it a pixel density of 144 PPI. The screen-to-body ratio is 57.8%, providing a decent viewing experience for its size. The device has a 256 MB internal memory and 512 MB of RAM, with the option to expand storage up to 32 GB using a microSD card.

In terms of connectivity, the Karbonn A4 supports 2G GSM networks and Wi-Fi 802.11 b/g/n for internet access. It also has Bluetooth, Edge, and GPRS capabilities. The phone features a 3.15 MP rear camera and a 0.3 MP front camera for basic photography needs. It has a 1400 mAh battery that offers up to 250 hours of standby time and up to 4 hours and 20 minutes of talk time.

Pros:
- Affordable price
- Dual SIM capability
- Expandable storage up to 32 GB
- Decent battery life

Cons:
- Outdated Android operating system
- Low internal memory and RAM
- Limited camera capabilities
- No GPS functionality

Overall, the Karbonn A4 is a basic smartphone suitable for users who need a simple device for calls, messaging, and light internet browsing. Its compact size and dual SIM support make it a convenient option for those looking for a budget-friendly mobile phone.