I bought a 7510 on ebay for use at my charity. I did not need the e-mail function as much as I needed an organizer and phone. The phone says it has 3.7 loaded on it. I tried to download 4.0 to my desktop and could not get it to sync with my Outlook. I can't seem to find the 3.7 version of the desktop manager. Is there some where I can buy it or make the 4.0 work with my phone? Any help would be great.

Download Desktop Manager 4.1 and handheld software 4.02, install both and then upgrade the phone software and try again.

There is no real reason to keep 3.7 on the phone.