Hi my name rajeev. I have a tata docomo sim which in am using for 2-3 years. tata docomo one one the worst network . I have ever used. if you ask for any help in custmor care they put the call on hold for server minets that eventually the person will cut the phone on his own. and tata docomo when I contact a costmor service the reply from them was so rude and careless when I contact higher . off icials regarding this thay responded very nice and solve it but again a same problem. and there charges are normal but internt speed is very low which irritates you so not to buy a tata docomo sim . company need to more to work on it