I purchased this headset to go with my Black RAZR phone as I was told 'it' was the headset specifically designed to work with the RAZR software.Unfortunately, it doesn't keep a reliable link to the phone and frequently drops the connection. Motorola claims there's not a problem yet, actual testing proves different. They went to market without testing this H500 thoroughly with the RAZR.It became so annoying that I stopped using it. This is clearly a software or hardware problem with the RAZR and/or H500.Oh, by the way, I actually had my RAZR swapped-out because I mistakenly thought it was the phone. Oh, and I even had the H500 swapped-out. In short, two different phones (RAZR) and two different headsets (H500). You can't use them together.Buy a different headset and test it before leaving the store.If you're wondering what I do for a living, I'm an engineer...I tested this for 3 weeks and you can't reliably use the H500 with a RAZR.Good luck!