I have that Zyxel, the 660 hw, problem is it has no voip. However, I call landlines free at any time using this modem, I just use my pc and use voipdiscount, as calling any landline in switzerland is free, as well as many other countries. I just paid them 10 euro which I don't use, only when I need to call mobiles.

Not sure if that helps but Sunrise screwed me big time, I am just pointing out you may not need their offer, unless you want VOIP through your modem . Does that new device not have wireless? If not, you are downgrading in truth as I think having to buy an access point is stupid. I know because in my infinite wisdom (not) I went to cable, and wanted to use the 660hw to act as a wireless access point but you cannot becuase it does not have an upload ethernet port. See post I made that Mark answered on cable router wireless (three keywords). So I had to buy an access point, and I hate unnecessary consumerism. Sorry bit of a rant here.