I am running VOIP on Teksavvy.com in Canada. I am using a corded Panasonic house phone running through a Grandstream HT812. The phone has digital answer. This works fine, I now want to add my Samsung smart phone now that I am no longer using it as a cell phone. How do I get it to work as a remote device in the house and on the road when I come across an internet free zone. I would also like to text from this device. Can you help. Thanks, and take care.