I lives in ghaziabad, in my city the network in not so good . BUT I must say that for using basic apps like whatsapp, for searching on internet its network is ok which is very good for teenagers as its data pack is affordable compare to vodafone and airtel.
For people who are using dual sim phone I recommend it because for important call they may use another sim and for using internet they may use BSNL.
And now there is no roaming so, double fun