The worst thing ever happened to me was purchasing a Tata doComo sim card. Laugh at me because I just saw The name tag Tata and bought the sim. But as I have mentioned that it was the worst thing ever happened to me I found everything very pathetic in the sim. No proper network neither for call nor for Internet.
When I tried to call customer support I will I just kept on waiting waiting and waiting and when I talk to them so it's the worst same in the market in my view so please don't dare to purchase it I mention DARE because only if you have a big heart you are going to purchase the sim.