I did not read the reviews when ordering this product, otherwise I would have seen the one that said "Nextel customers stop here"... although mine is Sprint, they're pretty much the same when it comes to the reason this software won't work on our phones. It did take a while to get the software even though I asked for "expedited", but when it finally did arrive, it would recognize my friend's phone (T-Mobile) but not mine. I tried it at work and again, it would recogize another phone (Cingular) but not mine. I called Sprint and was told that they made Motorola change features of the phone before shipping to them, so this probably has something to do with the problem. Another lady at work tried to show me how to "sync" my phone with hers but couldn't because I didn't have that feature... maybe that's part of the problem. Looks like I'll be returning this product (if possible). Unfortunately, I also ordered a PC adapter so I can listen to music off my PC through my bluetooth headset, so I hope that doesn't give me problems, too.Mind you, this does look like a cool product, but I am sorely dissapointed that it won't work for me simply because I use Sprint.