The 3G/video calling enabled Signature Two A500 comes with a mega 2000mAh battery.
With a 5-inch FWVGA display, the device is powered by a 1.3 GHz dual core processor and runs on the new Android Kitkat OS. The dual SIM phone also features a 5 MP rear camera.
The phone was unveiled by Celkon brand ambassador Tammanaah Bhatia.
Talking about the launch, Murali Retineni, executive director Celkon Mobiles said, "The Signature A500 will certainly be a unique and engaging device for all. We are pleased to have this partnership with Flipkart to enable reaching out to the entire country with this exciting new model.
Celkon Mobiles had recently introduced the slimmest Indian smartphone Vogue Q455 as part of its new Millennium Series.