I migrated to ULD 1091 in Chennai earlier this week and had to go through the same problems faced by Zerosleeping! The new plan was activated on the same day of my application but the download/upload speeds were still as per old plan. Finally, after a visit to the telephone exchange, got my speed upgraded to 8 Mbps from 4 Mbps. Strangely, my upload speed got downgraded to 252 Kbps from the earlier 380 Kbps. Unfortunately, I did not check the upload speed before migrating to the new plan and now when I try to look for information, there is not much details available about this plan on the BSNL Chennai website.