So far this works great with my v323i phone. I have U.S. Cellular, and when I got this phone I was very frustrated that they advertise a fully "mp3 ringtone capable" phone, but offer no way for me to copy my own mp3's from my PC. They tell me I have to subscribe to their EasyEdge service. No thanks!After hours of digging on the internet and trying different free programs without success, I bought Phone Tools as a last resort. And I am SO glad I did: this program does just exactly what I wanted it to do. I was a little worried that U.S. Cellular might have blocked it from accessing my phone, but that is not the case. With Phone Tools I can do everything Amazon's description says I can do, though I haven't tried using it as a modem or connecting via Bluetooth.The only quirk is that the program does not recognize the v323i automatically; each time I plug in the phone I have to click through several more menus to manually select the kind of phone I have. But after that it works perfectly. I have my own mp3's as my ringtones now, and they sound great.I bought Phone Tools 4 direct from [...] and it came exactly as pictured. Don't bother with the third-party sellers! To me, $[...] is a great deal, compared with the $[...] you pay on Motorola's website for the exact same thing.