Guys I have been using airtel sim for a month but I am not only dissatisfied by their network but also with the customer support . I purchased sim with a offer to get 1 GB data and Rs. 20 talktime for a month . But when I put my sim card on mobile, the number of network bars is only one and I am not able to connect with data services then I called customer care, they said me there is no problem from their side, please change your sim card then I asked them, what about my plan, it retain in new sim or not, they said no, what the hell it was, problem present in their sim card and I had to lose my money for nothing .