A telemarketing phone call. Just like spam email, a spam phone call is unsolicited. Starting in the 2016 time frame, "neighborhood number spoofing" was on the rise, in which the calling phone numbers have the same area code and exchange as the recipient of the call. See
spam and
robocall.
Phone Spam Detector
Based on a list of reported phone numbers, this Samsung Galaxy phone warns the user that the incoming phone call is unwanted.