Just now I called for the first time, @Sol. I had logged into change my VOIP home number to show UNKNOWN NUMBER and to not show any 'phone number.
A guy answered speaking a foreign language at first. I said “hello” and he said a few more sentences in a foreign language. I mocked him and insulted him, at which point he asked in broken English, “Say again?” He hung up when I told him that he is a stupid criminal who needs to improve his skills in the English language. He hung up.
Maybe he saw that my call showed no 'phone number and showed only UNKNOWN NUMBER.
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I am calling (706) 616-6937 from my TextMe 'phone number. Yes, a guy is on call now and I can understand his use of English a bit better than the first call I made.