Rs.200 for 2GB in a month
Rs.400 for 4GB in a month
Rs.999 for Unlimited in a month
You can also subscribe to both Rs.200 and Rs.400 deals to get Rs.600 for 6GB in a month
Rs.400 for Unlimited in a month
The maximum theoretical downlink of EDGE is 296kbps(37kB/s) on Nokia phones as they have Class 32 EDGE.
On the other hand, Vfone is:
On Prepaid: Rs.6/hour which is damn expensive if you do the math
On Postpaid: 500/month for 500 hours which is like unlimited as it is 16+hours/day for month
The maximum theoretical downlink for CDMA2000 is 153.6kbps(19.2kB/s)
The problem is that in practical usage, Zong might really suck, so the best thing to do, is get a Zong SIM and run a speedtest, if you are satisfied with the speed, then go for it. BTW if you have GPRS in your area like I do, just save yourself the hassle and go with Vfone, as Vfone is much much faster than Zong's GPRS in any case, but EDGE is a whole other story.