if I remember correct, the update profile doesn't work if your supercid'd. you simply have to copy all the personal authentication info from one to the other.
the tricky part is that the auth passwords are in unicode. I've always just used phm notepad to copy/paste from the old and into the new..
then the other trick is that only 1 phone can use a service at a time. however one can use 1x (voice/sms) and the other can use evdo.
