Please have some respect for licences, Micromax Mobile. The sources that you are basing all your android product on are GPL licensed. So if you use them ( for commercial purposes), you have to share the source code.
If not for the legal sake, do it to support your developer community and then you can expect it to support you. You are stealing from open source (linux) community. What impression does it leave with us, developers!
Share , not steal. We dont like patents and we will never be using them as our tool. But, that does not mean that we particularly enjoy someone using our contribution for their own vested interests. On a stricter note, you might someday face a legal notice from one of us, contributers of the open source community, at your doorstep.
Hope , your realise :O
For those who want to read up more, here is a link for you