Question about custom domain names.

My site is currently http://ElectronicNetwork.all-up.com
If I bought a custom domain what will happen to the link above^ ?
Will people still be able to access my forum by visiting the above link? I have posted that link on many different sites to advertise it and was wondering if its going to be a problem if I change my domain name.

If you have a redirect yes,

The thing would change to electronicnetwork.com (if availiable)

Hello,

Yes users will still be able to access your forum with the free subdomain, and the domain name. (even with redirect on )

Oh ok cool, thx. I was hoping it automatically redirected the old sub-domain to the new paid domain.

it directs to the same board either way however