Thank for the detail.
I thought that was the case, I could see the username in the the authorization request through wireshark. Formatted as you specified, was what I was seeing. It turns out the carrier’s tech’s were incorrect… Although it was specified that way in the register string, which I corrected from what they told me.
I did have to correct the register strings they provided, and they were actually blcoking the registration for some reason. It Now looks great!
Thanks!
