[ubuntu] Huawaei e303c on ubuntu 12.04 not detected

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http://ubuntuforums.org – I bought one Huawei data internet usb stick. I followed the linux installation guide from: http://www.huaweidevice.co.in/Support/Downloads/ after I use pon as command I see no error. but I am unable to open any site I mean no internet. One thing I doubt very much-in the tutorial in section 'manually selectmodem port', how to know the port my modem is on. I used ttyUSB_utps_modem, as recommended.. but I strongly feel its not correct. How to get exact name of the port where it is on? One more thing.. I am going to use Airtel 3G, so I am not given any provider's id or password, but I see (Hardware)