general question SipDroid usage

[Peter]

Hi,

I will have no cellphone connection in my future home, as it has loads
of metal in the concrete / window frames .. etc.

So, what I would like to do for me and my wife is:

Keep using my cellphone as I have always been using it (it's paid by
my company anyway), but:


When my phone is on WIFI and has no cellphone connection, make it
switch to VOIP.

This in such a way that:

I can make calls as easy as possible
People can still contact me using the same number ( even if that means
that I have to pay for the forwarding)

So, is this use case covered ?

Thx in advance