I purchased this item to use with my Motorola V551 on Cingular/ATT service. The software did not work, did not recognize the Cellstick. I tried the updated version of the software from the web site, that did not work either. I tried to email the customer support people, it's been over a week and still do not have a response to my inquiry.CONCLUSION: This is a poorly designed, poorly implemented product that is only to get your money. DO NOT PURCHASE!!!