This is the sim which I bought first and as the call rates were very less. When I inserted the sim in cell there were no networks and I waited for 2 hours after activation then also I didn’t get anything good response in network. So this was the time when needed to call customer care and it was busy then later again I tried it was the same busy and I was in queue but for 10 mins the number will be same. For 3 days I was served bad by Dolphin and within 3 day I threw away the sim.