Well I have tata docomo mobile sim and.belive me really its worriest sim ever I have. Some time also call was drop and when we going to hill stasion for holidays more bad signals.
Internet speed so bad. only postive things on tata docomo they have low cost of call rates. Customer service not bad . they will try to doing help but if operator system not good then wht can they do .
When someone call us then always signals busy . overall not good service they provide to us.