First download TOI App :
http://dl2.apk-dl.com/store/download/details?id=com.toi.reader.activities
You will see below screen
After successful login wait for few minutes you will get another popup with recharge voucher.
Proof
https://play.google.com/store/apps/details?id=com.toi.reader.activities&hl=enor
http://dl2.apk-dl.com/store/download/details?id=com.toi.reader.activities
You will see below screen
Tick mark on I agree to the offer's Terms & Conditions.
Then click on LOGIN WITH FACEBOOK.After successful login wait for few minutes you will get another popup with recharge voucher.
Proof
Note : Voucher Valid At Paytm App till 31st March 2015
Facebook account should be 90 days old and must have atleast 10 friends