I am using dolphin since 6years
Its signals are the main problem. Earlier it was good but now it is horrible .Whenever I try to contact any one there are no signals. When there are signals they say that the numer you xalled is not reachable
My friends, family always complain that my number is not reachable. If you are in metro or lift it donot catch signals at all. Internet pack is cheap but not of any use. My recommendation is you shuld not choose dolphin
