Everything works nicely with my 7100t with Intellisync. I am at version 4.0!
I can not sync my calendar. Everytime I try I get "Unable to Complete Request".
When I look at the log is tells me:an Internal Error #4088.
I have tried the varios option to no avail. If I could get this to work I have no need of my Dell Axim.
I loaded 4.0 and have no problems synching with Outlook (2002, SP-2). If you're still having problems, I'd be glad to help, although my best recommendation is to call T-Mobile.
I finally found the problem. I deleted all calendar entries and then started adding them back. Problem was a yearly recurring item. It was setup to end in the year 3000. For some reason it did not effect Outlook but Intellisync did not like it.