Free Online Recharge using mCent :

mCent is a mobile website to discover mobile content and get free airtime for your mobile phone. You will free recharge based on  different kinds of activities such as downloading and using apps, taking surveys, watching videos, signing up for a service, and/or participating in contests.You can also earn recharge by  successfully referring your friends to register with and complete mCent offers.

To get free airtime from mCent, you must first become a mCent member by registration using your mobile number.You can also register using your Facebook account. Earning airtime may also require you to enter additional information about yourself, such as your email address, birthday, or other information about yourself.

How do I redeem my airtime?

Go to your Get Airtime page. When you have enough airtime to top-up, you can click the top-up button.

If you do not have enough to top-up, participate in and complete offers available to you.

Pros:

Minimum payout Rs.10

Earn up to Rs. 4000 every week.

Supports post paid mobile phones (only in India).

Cons:

You cannot delete your account.