Earlier I had BSNL excel , which is very cheap and very good network covergae , then I switch over to RIM prepaid , as I have most of STD calls so I use Reliace India STD card in which R 2 R is 1 Rs only and Rs2 to other phones , with full recharge , but now I have swithced finally to FWP Under Plan 700 in which R 2 R all india is free , the only problem I face is singal inside my room , as this is cordless phone so I can move around say 6-7 KM in radius . Customer Care is excellent although no work has been done regarding improving the singal but CC people good at giving sweet pills , one should opt for this if you call to reliace fones my bill is 50 % now after getting this connection .
One more thing I want to add , 150 Calls are free which can used for STD or Local depending upon pulse , @ 1.10 Rs which is quite reasonable and comparable to other service provider.