Queries about BSNL postpaid connection

[mnreddy]

Hi,I have few queries on BSNL postpaid connections. I tried getting answers from customer care. you know the quality of answers you get from those illiterate BSNL customer care folks.How to convert prepaid 3G number to a Postpaid number?How can I change my postpaid plan, if I want to? should I goto BSNL CSC? or can be done via customer care?How to findout 3G data usage(in Karnataka Circle) for postpaid number?Do I need to give a separate request to activate national roaming for postpaid connections?Thanks in advance for you help.