Alert notification on the smartphone

alert, phone, reminder, smartphone, alarm, attention, caution, danger, error, exclamation, hazard, icon, isolated, message, mobile, risk, safety, sign, announcement, attack, beware, careful, flat, hacker, information, internet, screen, secure, security, sms, vector, warning, notice, access, computer, connection, crime, cyber, hazardous, illustration, important, lock, network, online, protect, protection, scam, technology, text, triangle