Since past one week, I am facing serious problem due to call drops. A call does not last for more than a minute and most of the time I get an error message 'Network Busy'. With the introduction of Mobile Number Portability, I was expecting an improvement in Dolphin services. But its getting worse from bad. Whereas most of the privately run telecoms are putting in effort to make their services and network coverage better to attract more customer, MTNL is putting in effort to loose customers for the benefit of other telecoms. I am... read full review »