yes i also did this my regional free pack is hindi and marathi then i subscribe tamil pack and call the helpline that i have not received some tamil channels and there reply is ur box is not sup mpeg4 and tata sky upgrade the mpeg4 technology. They told me are u reddy to sd mpeg4 box replacement i said yes and they bookd my req and next day my box is replaced with new technicolor mpge4 box gus use this trick of roi customers .Add any south regional pack and asked to replace ur stb to tata helpline