Have I successfully completed the downgrade if my pda/phone info is as follows:
pda version
S:i730.WM5.2.6V.ZB21.14928
phone version
S:i730.2.6V.YE05

I was able to get a connection on my pc and laptop thru USB. but I changed around my home network and deleted the internet setting. then I was unable to even get my phone to sync with my desktop. got that back but still I only get error 692 when I try to dial up an internet connection. I know the phone links via usb because the pst doftware can read the info when it is connected thru USB.