In response to the posts, I did have my data backed up, I've been playing with computers since DOS 4.0 was cutting edge, learned that lesson a long time ago. As to how I used it, I followed the instructions it gave me, made sure I told it that the data on the phone overrode the data on the computer (for the initial sync from phone to computer) then told it to sync, it promptly deleted all but one entry from my contacts. I'm glad it worked fro you pellonet, but as I said, I paid attention to the settings, and followed the instructions, it started a delete all on it's own.