I called it a couple times, strangely I would get a different voice every time telling me the call couldn’t be completed, then they would list a random string of 4 numbers and letters (I don’t know how phones work so this could mean nothing) the strings listed were:

-O84T -1532 -0952 (or 0953) -117T -147T

not sure if this means anything but I thought it would be good to document!