I am on the NU590 plan in Mumbai. During the day I get speeds of 25 kbps from link-removed (my plan is 256 KBPS). But like everyone else on these forums, even I experience pathetic speeds after reconnecting at 12 AM. And I am sure that this is due to MTNL blocking the speeds for those reconnecting under the Night Unlimited Plan. I am certain because if I don't disconnect & reconnect at 12 AM, I continue to get good connection speeds of 25 kbps uptil 2 AM also. Its only when I disconnect & reconnect at 12 that the speeds go down. And the speed goes down to as low as 7 kbps from link-removed. I wanted to upgrade my plan to NU849 so that I can get 2 MBPS speeds instead of 256 KBPS. But if the problem exists for 849NU scheme users as well, then I guess no point in me changing over.