Don't do them, stay away from them....Unless you wanna get called in the middle of the night by a hysterical woman.
For example:
<Phone rings>
Sapiens: <Wakes up and looks at clock> “3:20AM”
Sapiens: <Picks up phone and answers> “Moshi, moshi.”
UnknownFemaleVoice: “Um, hello.”
Sapiens...