Have a look at mtnl mumbai they provide http://mtnlmumbai.in/index.php/narrow-band-plan 256kbps plans termed as narrow band plans likewise there are many providers that still provide 256kbps plans.I think by now all providers have updated their plans to a minimum of 512 kbps. People hope that they make it 2 Mbps. Personally don't see that happening before 2017.