You can now avail an Airtel Postpaid Onlinerecharge from anywhere at any time within your comfort. You can also download the Smaart Recharge app for free for Android, iOS and Windows devices to do online recharge & keep yourself connected to your account at all times.
For more details about Airtel post-paid bill payment: http://smaart.co.in/recharge/airtel-postpaid-online-bill-payment.php