Wireless Router Config with Mobile Broadband

There might be similar questions out there but I haven't been able to find anything. Short of being actually able to test this myself here it goes:

I would like to ditch my eircom dsl for a mobile broadband provider but I also want to setup a cordless VOIP phone (not a wi-fi model).

So, could I keep my wireless network going - with only internet coming straight into my PC? Could my PC communicate with the router and pass data back and forth say if I was on the cordless VOIP phone that would be plugged into the back of the wireless modem via ethernet cable I imagine.

I'm open to all solutions and my priority will be to setup the VOIP phone even if that means keeping eircom.

Many thanks-

I am not sure about the router configuration, but in terms of using 3G for VOIP, you would want a rock-solid 3G connection. So the first thing to check is that you have that.

The other thing to check is that your mobile operator allows VOIP on it's 3G network.