Bharat Sanchar Nigam Limited (BSNL) has launched various unlimited calling plans under Rs. 500 for its users to enjoy long calls from one place to the other. Under the unlimited calling plans in exchange of Rs. 500 offered by BSNL, users can opt for the plan which suits them the most. All the plans which offer unlimited calling in exchange of Rs. 500 or less possess different kinds of benefits and validity which can be attained as per the customer need. The plans range from Rs. 97 to Rs. 500 and can be attained and changed as per the requirement. BSNL Rs. 97 Plan For Unlimited Calling The state-owned telecom firm BSNL had earlier introduced a plan of Rs. 97 which offers unlimited calling as well as a date plan for the users. This plan was initially made valid for the buyers of Micromax’s 4G VoLTE enabled Bharat Phone. This plan valid for the Bharat Phone supports a 3G connection also. BSNL’s Triple Ace or STV333 Offer The triple ace or STV333 is another offer whic...