Research in Motion is trying to sweeten the deal on its BlackBerry Curve 9220 and Curve 9320 smartphones in India by offering free BlackBerry Messenger Services (BBM) for year. RIM has teamed up with two telecom operators, Airtel and Vodafone, for this special offer.

To partake in this offer, users need to buy a new Airtel or Vodafone connection between November 9th and December 9th, 2012 and opt for this plan. For Vodafone subscribers the services will start within 48 hours of inserting the SIM in the smartphone. Airtel users will have to send SMS to 543210 with the message ‘BBM’ to activate their free service.

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Usually these BlackBerry Messenger plans cost Rs. 129 per month and let BlackBerry users share unlimited messages, pictures, music and files (<6MB) for free with other BlackBerry Messenger users.