[madhurjain]

@z3t4 data cards from phone providers are carrier locked and don't allow third party softwares to access modem via AT commands. We've tried with some generic data cards from Huawei and ZTE and they work great

For example http://www.amazon.co.uk/HUAWEI-E3256s-Wireless-Mobile-Broadb... or http://www.amazon.co.uk/computers/dp/B004VU09BU/

You'll have to check for micro SIM support though. I haven't come across a stick which supports micro SIM yet.