Hello guys. I have a big problem that makes me crazy. I receive 10+ unknown calls per day, and I do not know how to find out who is calling you and do not know how to block such calls as sometimes the number is hidden or it is not repeated. It is like you receive calls from the robot who generates different numbers to destroy your nerves. There are situations, when I need to concentrate my attention on important tasks but can't do this. I can't switch off the volume on my phone as I can get receive important calls from the office while I am working remotely. I know that there are some apps and tools such as reverse phone number lookup and before blocking such call it will be interested to know who is calling to leave some"positive" comments.