I have MTNL Triband "DSL_Unlimited 749" plan currently. Just visited their unlimited triband plans page and saw that "DSL_Unlimited 749" is no longer listed but "DSL_Unlimited 599" is offering the same speed as the earlier 749 plan (except I think the night speed is 752 kbps instead of the earlier 1 mbps).Should I downgrade my plan by sending an application to our MTNL exchange or will MTNL do this automatically..