Robin wrote:
We'd certainly miss the intercom & call-transfer facilities on DECT
phones. Can they be replicated using wifi on PAYG Smart phones?

Not natively. You can do it on the VOIP side, but it needs some support
from your service provider - essentially you have multiple extensions all
with different VOIP logins. Alternatively you could run your own PABX using
something like Asterisk, and the service provider is your upstream from
there.

Theo