What Are Notification Icons?
As you would find and see while using a computer or laptop, notification icons are small thumbnail pictures that alert you to something. For Windows, Mac, and Linux users, these are usually things like updates are available, a USB device is plugged in, or email is in the inbox (depending on the program or widget).
Notification icons on a cell or smartphone are much the same; typically seen at the top level of the phone's screen, the notification bar holds information as to what is going on with your phone. Some icons are permanently displayed, such as the time, signal, network (between cell and Wi-Fi), as well as programs that you have running in the background on a daily basis, such as an alarm clock or task manager.
Other icons are ones that appear when something happens currently, such as receiving an email or text message and can either disappear when the user checks them or stay permanent in the case when more than one happen (with emails, missed calls, voicemail, etc).
Below is a listing of the frequently seen BlackBerry notification icons, regardless of phone model, as well as their explanation.