I'm disappointed with this problem and spent a lot of time to find solution.
I think now the problem is with services book and/or authorization to go out BB Network.
The day I had my BB8800 I made a try to pair with my GO910. Pairing was OK : detection of hands free and DUN capabilities BUT impossible to get the DUN connection works.
I swap the SIM card with another one I used with a VMCC. I try again and.... EVERYTHING WORKS !!!!
I re-swap the SIM thinking it was only a problem to adjust some option on my vodafone account.
The next day, my business mail option was activated. I made some tries with the twice SIM cards (old VMCC and BB one) : I couldn't manage to succeed with any...
What are the différences between these tries ?
=> Business mail was activated so I received a new services book.
It's the reason why I think the problem is around services book and authorization to reach another network from BB net.
Does anyone can reach 2nd level support by BB ?
Does anyone know how to hack the services book. I think a way to progress would be to compare services book between one BB without mail services (does it exist more than one day ???) and one with.