^^^ Recharge with Rs 500 or such larger amount is not possible now, at least couldn't find that option for on-line recharge on Idea website.
When I enter mobile number, it displays only fixed amount packs which has free outgoing calls/Internet with validity of 10/28/82/90 days, but we cannot simply topup account balance now.
Directly Rs 5000 amount option is available with unrestricted validity!!!