A visual alert on a cellular telephone that indicates an incoming call or notification. Typically, this takes the form of a small LED that blinks or illuminates when the device rings or receives a message. For example, users in noisy environments or those with hearing impairments may rely on this feature to avoid missing important communications.
This indicator provides a discreet and often indispensable means of communication awareness. Its utility extends to situations where audible alerts are disruptive or prohibited, such as meetings or medical facilities. Historically, this type of notification has evolved from simple, single-color indicators to more sophisticated, customizable light patterns and colors, offering users greater control over their alerting preferences.
