Been using Reliance Night zoom plan for Rs.999/- for over 3 months now. This is how it works with reliance:
1. Reliance engineer will tell you if they can give Freedom 999 plan. Its not available at all the locations. I was informed that I can still go for it but I will get only 2mbps or thereabouts.
2. You have to login each time through browser interface. I remember reading some trick somewhere but it didnt work for me.. So didnt try any further experiments.
3. I am using Netgear DGND3700. Unless I set "Use Computer MAC Address", I cannot login.
4. If reliance says plan is unlimited, it is unlimited. Never faced any reduced speed issue.. have crossed 60GB in a month.
5. Few pirated MP3 sites are blocked but torrents work - be it isohunt or piratebay.
With new plans, I may be shifting to 4mbps at an extra Rs.100/-

Avoid combo plans though unless phone is of extreme importance.