I unlocked Huawei EC1561 MTS data card.....now what?

I used DC unlocker subscription for unlocking EC1561 MTS data card. This data card has UIM slot. What options do I have? Which providers provide EVDO sim. I am from Pune, Maharashtra.

Please tell which CDMA SIM card I can use in it?

BSNL is the only service provider who have EVDO sim cards. Most probably you can use any CDMA sim card, as the data card has been unlocked.