Ever since Reliance Jio entered the picture with its disruptive pricing, free calls and cheap data rates, the rest of the telecom sector has been hard at work trying to catch up. Now, Airtel and Vodafone have just revamped their postpaid plans in a bid to lure customers away from Jio. Both companies are offering 20GB of 4G data along with unlimited calls for just Rs 499 per month. Airtel is now offering 20GB of 4G data, unlimited local and STD calls, unlimited free outgoing calls on national roaming along with 100 SMS per day for just Rs 499 per month (plus taxes). You also get a free subscription to Wynk Music and Airtel TV for the duration of the plan. The icing on the cake is the fact that the Rs 499 plan also gets you a subscription to Airtel Secure. With Airtel Secure, you can protect your smartphone against malware (via Norton Mobile Security) and physical damage. You also get 2GB of cloud storage for free. If your device is accidentally damaged, Airtel will arrange f...