My Iphone 4S was stopped responding So I gave it to Totoodo service center in Madhapur, Hyderabad. They damaged its motherboard and completely tempered.
Once they called and said it is battery issue and now it is working . After few mins they called and said that issue with the motherboard and told me estimated cost 2500/-, when I said motherboard cost less than that immediately they agreed to replace motherboard for 1800/-. But finally they handover me completely spoiled piece. This is worst service center.