Reliance WiFi data card provides a very good speed. I am using it from last three months. It has dual connectivity via USB or WiFi.
It gives me a better coverage other then GSM services, even I can use internet in corners of my offices where GSM network not available.
It is easy to use, just plug in power socket with its socket or mount on USB port at your laptop.
It is giving nice services. I recommend this to all.