I don't like the "confirm calls" feature, although I have no problem with having it as an option. Lingo was able to route calls to Lingo voicemail even when simulring went to the cell phone and the cell phone forwarded back to Lingo. I don't know how they did it, but it worked. Lingo did have the disadvantage, however, that calls would go straight to Lingo voicemail when the cell phone was turned off (so I kept it on).