I am using Idea SIM from last 4 months and I am not happy while using it . Firstly I was using Docomo Sim and I replace it with Idea SIM because wherever I go there I found no network on my phone but same thing is happening with this SIM too . So what’s the difference of changing that SIM . Sorry to say but the speed of the network is also too slow . Once upon a time I was lack of balance and I can’t even call to customer care, because it also needed money . Offers are not good as airtel . Internet offers are costly . While connecting the calls it takes too much time . Call sometimes even gets disconnected in between due to poor network . Billing is ok .