Recharge your prepaid mobile phone online

Service providers:
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Vodafone: http://www.vodafone.in/online_prepaid_recharge/online_recharge_mobile.aspx
BSNL: http://portal.bsnl.in/rc/aspxfiles/login.aspx


Banks:
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HDFC Bank: http://www.hdfcbank.com/personal/payments/prepaid_refill/pre_refill.htm
ICICI: http://www.icicibank.com/Personal-Banking/onlineservice/online-services/PrepaidMobileRecharge/prepaid-mobile-recharge.html

Third party (I have personally not used any of them, but looks good)):
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http://www.rechargeitnow.com
http://www.onestoprecharge.com
http://rechargemobilephones.com/india/online-recharge-mobile/

Hope this information is helpful.