I got missed calls more than 5 times. I meant not to call back. cuz I knew it could be one of those fake calls that might hack my mobile or the hocus-pocus being done these days.  The I was curios to know I refer to google search to check the origin of this number.It was from east Africa but the country was not defined. After the seventh calls I tried to call back. then I heard such a switchboard with none understandable language. But I hung up.  Still I got that called but I ignore it as well.