Hey Guys i m new to all this, actually one of my nearby shopkeeper is selling these types of modem using this trick and demanding 2000 rs for modem and 300 rs for 5gb per month but u guys are doing this on your own, i live in faridabad (Delhi - NCR), Can u plzz tell me how can i do this trick in Vodafone K3770 Usb Modem and i have a tata indicom SIM. ThanQ in advance, God Bless u All !!