I have signed up for Easy Mobile Recharge website in 2010. Since then I am using it frequently. It’s application is also available at play store. I like it mostly because it covers a very little space in your mobile’s memory.
It has many choices to add money in your wallet eg Net banking, debit card or credit card.
Its recharging process it very fast and you will never find that recharge failed.
If recharge failed due to some reason you will be credited same time in your wallet which is fasted action in between all online recharge providers.