Upgrading 2talk account

Hi

I recently signed up to a 2talk "Go Free" account to test out VoIP. The test went well, so I now plan to switch to VoIP as a landline replacement.

I would like to upgrade to the "2talk 10" plan, which includes one local number.

If I upgrade my plan in the 2talk online portal, will I then be able to add a regional number at no extra cost? Or will I be stuck with the 028 number I was given when I signed up to the free plan? (and if so, would I be better off creating a new account rather than upgrading my existing one?).

Cheers!