My phone number (originally Bell Cable, then NTL, then Virgin Media) was ported to BT as a callsign, then moved to Sipgate.
BT insisted my VM number was the primary number so when I tried porting it, they cancelled the second number rather than move that to the primary. They then cancelled the primary, rather than re-instate the secondary as a primary.
I think you get the picture.
Be prepared for lots of hassle!
Keef- Dartford Kent UK - Plusnet via Siemens Gigaset SE587
Previously - Virgin/NTL/Bell Cable, Crosswinds, IC24, FreeOnlineNet, X-Stream,
Totalise, Freeserve, Force9, TescoNet, AOL, Freenetname, Pipex, E7