I have 2.4Ghz phones, they're the expandable ones you only need one phone line for. If I gat a wireless broadband router also 2.4 Ghz will they interfere with each other?
That is a strong possibility. My phone and router conflict from time to time as well and as a result have to power-cycle the router every week or so.
I had problems with my 2.4Ghz cordless. My second pc connects via wireless pci card and every so often I would lose my connection when someone used the cordless. So I just bought a new cordless a 5.8Ghz phone.