http://tatadocomo.com/march-offer.aspx

• Get 10% cashback On every recharge only on tatadocomo.com during the campaign period.
• Cashback will be auto-credited to you account (Net banking/DC/CC) within 6 to 10 days of recharge date.
• Offer only applicable for select prepay GSM mobile customers.
• Offer not applicable for ‘Pay by Mobile Balance’ option.
• Maximum cashback is Rs.100 per customer.
• Validity- 2nd March to 6th March.