I have purchased new karbonn mobile from a dealer 2012 january. but its become dead after 1 month use.It has 1 year warranty. So i gave to authoruzed service centre. But they replied that the mobile was purchased not from a dealer from their list and refused to service the same. I have again contacted the service centre and the sales outlet. There too some negative approaches. This shows inefficiency of Karbonn mobile phones and their after service. Of course I am totally fed-up with their acts & services.