Bharti Airtel will offer free access to social networking site Facebook in nine regional Indian languages to its prepaid customers across the country for a limited period,the company said today. ".it will offer free Facebook access in 9 regional Indian languages to its prepaid customers across India," Bharti Airtel said in a statement. The company said its customers who are Facebook users on the mobile (browser or app) will be able to access Facebook in Hindi,Bengali,Gujarati,Marathi,Punjabi,Tamil,Telugu,Kannada and Malayalam. "A limited period offer,Airtel will allow customers to access Facebook free of cost with a cap of 30 MB/ month to add joy to the festivities," the statement added. The company said the interface is compatible with feature,Java,Android,iPhone & Windows devices alike.