This modem is used by my wife. When I am at another town, she communicates with me using this modem. We went to one of the computer shop at Nagoya Hill looking for HSDPA modem. The reason that I bought this modem is because HADPA network is very booming at that time, until now. All cellular operators in Indonesia provide internet service with HSDPA speed at maximum, which means users can access internet with speed up to 7.2mpbs. This modem supports all type of GSM cards. There are two green led inside the modem. One led indicates for data and another is for power. This modem does not use any additional cable in order to connect it into USB port. The disadvantage of this modem is that it uses additional battery as the power source. This is not good because when the battery is drop or out of service, then I have to buy a new one. I hope they still sell the battery; otherwise I cannot use this modem anymore. This product is made by AT&T. It is available at most computer shops at Indonesia.