[Ilugc] Can i unlock BSNL Huawei EC325 Modem to use 3G sim ?

[balachandar]

Hi Guys,
   I am using BSNL Huawei EC325 modem( Provided with NIC connection,White
color dongle ).It has a slot to insert a sim card.But currently i am using
no sim card to connect to internet.I referred that it is capable of 3G 
network.Can i use a 3G sim in this modem to get high-speed internet
connection.Do i need to unlock the modem ? I dont know what to do and a 
google search is also not fruitful.The modem features a Serial No and
a ESN no on its back.Thank you guys.Eagerly waiting for your valuable 
suggestions.

 -- with regards,
          Balachandar.K.M
          http://infoqueue.wordpress.com