BSNL Customer Care Numbers & Contact Details Listed Bharat Sanchar Nigam Limited:  BSNL customer care numbers can be used to solve service related problems, technical queries, suggestions, feedback, prepaid/postpaid connections, plans, call rates, internet, 2G / 3G services, etc. inquiries. Both the mentioned numbers are for national customer care service numbers. Any BSNL mobile user from the whole country can …