Hi,I live in Nagpur, Maharashtra, India. I am willing to have 3G high speed internet connection in my home which can also be used in laptop while traveling. I want to have PREPAID plan, so that I can recharge it only when necessary. I am much concerned in the speed & availability, not much about the required amount of data, may be 500MB per month or some more will be used.I have some queries, if I buy the device (dongle) from Idea, reliance,tata, airtel etc, is it compulsory to use their service only? One of my friend suggested dongle make Huawei, which can accept any SIM. I am searching for a device that is 3G enabled & can accept any SIM.Secondly as the SIM card will be used in the USB dongle for data purpose only, will the free talktime offered will be wasted, or are there data only plans available at low cost.Can somebody suggest me proper device & service as per my need.Thanks