In the Indian telecommunications market, which is highly competitive, locking yourself to one operator's network is not a wise decision. But unfortunately, the 3G data card segment in India is dominated by SIM locked devices.
These devices have two major disadvantages. First, none of the 3G operators have a nationwide network and so you will be left high and dry if you travel to a place where your operator doesn't have a 3G network.
Also, with a locked SIM card, you cannot change the operator if you are not satisfied with the service. And buying a whole new connection is generally a costly affair. Moreover, operators keep changing tariff plans, so it is better to have the ability to change operators.
Thus, having an open network data card has a lot of advantages over locked SIM dongles. Here we have discussed the top five 3G data card options that are not locked to a network (also called open market data cards,) and are easily available at online as well as physical retail stores. Apart, from that shortlisted dongles support minimum 32 GB micro SD card.