I have a K-touch chinese E71 dual sim card phone with this ability to change voices and record calls too, c'mon if that thing can have it we sure can. BTW I pranked my "friend" by this thing, you know, I chose the female voice and called that "friend" telling him that I found this phone in a very far place from where the "friend" lives, and guess what? The "friend" went all over the 200 km to search for her...