Hi,

I use 'Draytel' (www.draytel.org) for my SIP calls via a Vigor 2800VG router, and have also had it working OK with Gizmo on my 770. A clleague also has it working fine on his nokia Phone (N95 IIRC)

Reasonable call charges both for incoming and outgoing PSTN calls.

Cheers,

Alistair