@vissu, they charge land line rental if you wish to go for any rent less plan-s later.
I have applied infact for Broadband 900UL plan. They asked my landline number, and i said i dont have one [I just wanted to tell them that i am not interested in phone but only on internet]. So he told me he will book landline and broadband with that plan ! (now 750UL) ! And i got the phone installed next day and a week later broadband.
These two happened in December and january first week. When they gave my first month bill (December without broadband), i got a bill of 3 (3 local call) (6 days)! They havent charged any since i was on a Rentless plan !
So it is always better to apply for phone and broadband together to speed up the broadband installation process (as i felt) !
Then , modem/
routers from BSNL are crap ? I have WA3002G4 router in which i can do everything as any normal modem/router does ! I never felt any issue neither with wireless nor with LAN !
Previously i used
D-Link 2-3 models,
Linksys 4-5 models, and
Netgear 2 models. In netgear and Dlink my wireless were getting disconnected often (say, sometimes while using
microwave oven and for unknown reasons)! Later i had to settle down to Linksys (dont remember the model) !
As far as i am concerned , this modem/router works perfect
(dont know about snr margins and stuffs. Never compared with other models) !