by EricLensherr » Tue Aug 08, 2006 6:29 am
As far as I know, there are no GSM/VoIP dual-mode phones available to the general public in the US right now. The closest that you can get to a true dual-mode phone is with Nokia's E60/61. They're basically the same phone, except that the E61 comes with a full keyboard keypad. You are able to make VoIP calls through an SIP server, but your SIP server must reside on the same side of the firewall as your phone. This is useful if your office uses SIP and you want to divert your office calls to your cellphone, but not if you're using a VoIP service like Axvoice. The only solution right now is to route your calls to/from your E60 through a PBX.