I use an MTNL sim, live near Palghar. This basically means that the sim uses the same BSNL network in Maharashtra circle, and MTNL in Mumbai. I kept this number on the MTNL network, as it used to be better for connectivity, when we used to travel to my native place in Konkan. Not any more.
Local BSNL network is non existent, most broadband users have switched to private players due to unreliability of the ADSL lines, and downtime.
In fact our local BSNL exchange, is being used as an adda in the evening. Jio/Airtel has better connectivity over road (Mumbai - Ahmedabad highway) as well as in train, western line.