We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.
Running off of a proprietary operating system, the Karbonn K15+ is a feature phone with dual SIM functionality modeling an LCD display with 240 x 320 pixel native resolution and a physical keypad. Additional features include 64MB internal storage, a microSD media slot (for up to 8GB storage expansion), a 1.3-megapixel rear-facing camera, as well as a Bluetooth connectivity option.
Dual SIM Functionality
240 x 320 Pixel Native Resolution
microSD Media Slot