Srt phone despite being a terrific device, didn't do that well. Main reason is that it had got initial negative reviews on Flipkart. Main negative mentioned on Flipkart was heating issue. As soon as I purchased this product, I got update and not faced that issue.
Same was with billion plus. Though it has monochrome lens, still it did not clicked good images. Smartron has said that it will improve after software update.
Maybe, due to initial negative reviews, they are not able to sell the awesome device. If all major issues are resolved before launch, smartron can sell much more devices.