This adapter works either with a USB dongle like the Huawei E220 or almost any cell phone. Together with a high-gain antenna, this device will improve your signal significantly, if you live in an area with poor coverage or if you are indoors with poor signal.

The adapter has been tested with many phones and found to work very well as long as there is a "regular" antenna built into the phone. The only phone currently known with which the adapter does not work well is the iPhone 4 and iPhone 4S because of the unique antenna design - the antenna problems with the iPhone are well-known. It will work with the 3G and 3GS though. To find the best position of the adapter on the phone,