How to use BSNL Data Card(Mobi Data 0x1c9e:0xf000) in Fedora 13

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http://www.linuxquestions.org – I used usb_modeswitch but the result was "No default vendor/product found." But usbmod_switch.conf file has all the vendor & product id contained in it. And modeprobe is also not effective. Even Sakis3g script fails to switch my datacard into modem. (HowTos)