From: BC on
Steve Wyles wrote:

>
>
> You'll need to re-register on my3 with your orange number, the settings
> on your sin should remain, but I believe you might have to set up
> voicemail again.
>
> Steve

I ported into 3 last June, there was no need to re-register, you just
log into your account with the new ported number. They update your
account details with the new number so you don't need to do anything else.