The Reliance Jio plans start at Rs. 149 for 28 days, for 300MB. For Rs. 499 per month you get a big step up, to 4GB of 4G data, plus unlimited 4G at night, for 28 days. You'll also get 8GB of access from Reliance Jio's upcoming network of Wi-Fi hotspots, further increasing the amount of data you can use. The Rs. 999 goes up to 10GB of 4G data, and 20GB of Wi-Fi usage, plus unlimited usage at night.
Further Jio plans are for Rs. 1,499 for 20GB, Rs. 2,499 for 35GB, the and Rs. 3,999 plan has 60GB of 4G data, and twice as much Wi-Fi usage respectively. The most expensive plan is for Rs. 4,999 for 75GB of 4G usage plus unlimited 4G usage at night, and 150GB of Wi-Fi data. The postpaid plans are similar, but you'll be paying taxes as well.
There are also a couple of other Reliance Jio plans that were not mentioned by Ambani on stage - aside from the various monthly plans, there is also a plan where you pay Rs. 19 for 100MB of data, plus unlimited nighttime usage, with a single day's validity. You also have a Rs. 129 plan with a 7 day validity offering 750MB and 1.5GB of Wi-Fi data, plus unlimited night usage, and a Rs. 229 plan which has a 21 day validity, for 2GB of data. These three plans are only for prepaid users.