well if u get the connection using the phone + Data cable it becomes a costly affair
firstly the handset, even the samsung slim model black one costs abt 1700 Rs in most of the Reliance Web World Outlets
seconds the original data cables coss anything from Rs 900 onwards
even a cheap one costs abt 400-500 bucks
and then u have to choose the righ scheme for ur phone
even if u get prepaid it wod be around 300 Rs
and then the 650 + service tax which wod come to abt 720 Rs
this aint a viable option for a Internet Connection
Instead get the BSNL second phone and the VSNL unlimited 1 month connection for rs 331