BSNL EVDO ( or WLL) is an exceptional service by BSNL.
Its like 3G so that means BSNL was the first to launch 3G in India but not many people know about this because of no advertisement.
-Pros=
EVDO speed is 3.1Mbps which gives about 200-300kbps downloading speed which is very good for 3G.
Awesome part about this service is that we can get Unlimited yes unlimited without any FUP in Rs840-842.
-Cons=
But because of our gov. now this awesome service is disappearing from India which is very bad for youth.
It depends on the coverage that means if your getting 5-4 bar you will get 200-300 speed but below 4 bar speed get worse.
Not available all over India
Support is also very bad.
As we know its BSNL so there are lots of other problems.