If you are sleeping and you are getting calls during the night, you might need to get up and check out the number. There is nothing so disturbing as being woke from a deep sleep. If it is family you need to not get mad as there might be a problem and they need to talk to you.  If it is not family or friends, then you can do a track cell phone number and find out who is calling you.  Kids like to pull telephone pranks.  I don’t know where they get cell phone numbers but some how they do. I would quickly put a stop to it!