This Trick is working 100%.
Reduce ur call rate for all operator just call customer care and and him to how to use mnp (mobile number portbility) and tell to you are going to change your operator.
Then send a message PORT<ur no.> to 1900. rs. 1 will be dedected with ur account. After 24 Hours your call rate rate will reduce to 30P/Minute this trick is working truly.
