why is it that noone's managed to hack the tesco siemens dect phone? it's a nice little device, but I want to use in on a different provider!

if indeed it automatically uses voip whenever it can, what happens when you're walking down the street and make a call, and as you dial you just happen to briefly walk past an open access point? call drops as soon as you walk out of range...

for it to work properly you would need to be able to roam between the 2, and that is where it gets tricky