Ключевые слова: accept, anonymous, answer, app, button, call, caller, cell, cellphone, communication, concept, crime, device, device user, dissatisfied customer, fake, fraud, hacker, hand, hang up, home, illegal, incoming, incoming call, mobile, mobile phone, no, number, person, phishing, phone, prank, reject, scam, scammer, screen, security, smart, smartphone, stalker, stranger, suspicious, technology, telemarketing, telephone, telephone scam, unidentified, unknown, upset client, using,