Huawei power Fi 8221 is a 3g data card. I brought it from Amazon. It supports all the Indian gsm sim cards. It works with both 2g and 3g GSM Networks.
We can plug it in any USB socket like moble chargers, usb ports in mp3 players, computer ports etc.we can connect upto 10 devices to this data card via wifi.
Network coverage is very good when compared to mobile phones and other modem.
Data speed is excellent and it is very easy to use. It will auto connect when connect it in any usb socket.
We can manage the data card settings using specified ip address.
If anyone have doubt in configuring this modem can post comment.