With Reliance Jio entering into the telecom sector a tariff war has begun amongall the other telco giants toattract more and more customers. Companies like Airtel, Idea, Vodafone and the state-owned BSNL are releasing slew of offers andpackages in response to theJio's free voice calls and cheap data plans.Reliance Industries launchedits Jio 4G services in India on September 5. The company announced that theservices will be open to all till December 31 under which customers get access to free unlimited data and free voice calls.While BSNL says that it expects to match the 'intense' competition tariff-by-tariff, Airtel has deployed new technology to improve its 4G speed and connectivity. Vodafone has also announced that it will now give out 10GB data at the cost of 1GB for new 4Gsmartphones. Similar offers are being rolled out by other telcos as well.