Yes it is Sir all the Sim cards available in the Indian market will support in this device you don't have to worry about this all the Vo-LTE services such as Reliance,Airtel and Vodafone will work absolutely fine. Yes####[['Vodafone', 'System#Software Compatibility', 'positive'], ['Airtel', 'System#Software Compatibility', 'positive'], ['Reliance', 'System#Software Compatibility', 'positive']]