The cellular operator (Airtel India) says it's a feature and argues that every operator has it and that iPhone, BlackBerry and Windows (etc) users don't have this problem. True.
Samsung support says - this is Google feature and then is quick to add - but we never sold Galaxy Nexus in India. No support there. Sorry, bye-bye.
I go to raise a Google-code issue just like this. Well, there's one already logged - years old. Of course without a fix or response from Google!
I'm an Android developer(day job) with a laaarge OEM but I doubt an Android is going to be my next phone. I am not comfortable with paying for anything very expansive then being on my own.
This is how Google provides support. They don't.