The ancients called this device a "Nokia 3310". While it looks a lot like our newest Fartalkers this is almost certainly mere coincidence. The idea ancient humans had developed anything like unwired-electromagnetics is laughable. More likely the object served some religious purpose though we can only speculate on the type of ceremonies it may have been used in.
There is recent evidence that as the end of the civilization drew nearer, the ancients fruitlessly increased the frequency and duration with which they performed these ceremonies. When coupled with geologic records, it's likely that famine and increasing tide levels had something to do with the increase of these ceremonies.
