A flash SMS or flash message is a short message
that is displayed directly on the mobile phone display as soon as it is received. The flash SMS does not have to be activated with the display key. In contrast to the normal short message service (SMS), mobile phones can neither send the short messages nor store their receipt, as neither function is implemented in the mobile phone network. They are sent via personal computers
with appropriate web-based SMS services. Flash SMS can be used for messaging and in mobile advertising. They can be used to transmit text messages with animations that take advantage of the attention of mobile users.