The emergency and disaster alert system was first introduced
in 2005 as a service that uses the mobile communication system
and allows users to receive data information (text messages)
from base stations by entering a specific reception ID (channel) into
their mobile phones.
The system uses the Cell Broadcast Service(CBS) feature of mobile
phones to provide text message instructions to mobile phone users
in the event of a disaster or if a disaster is expected.
The revision of the law in 2013 made it mandatory for all mobile
phone handsets to support CBS. Unlike the general method of text
messaging, CBS does not require entering of phone numbers,
which makes it do without the process of collecting personal
information. Aimed at protecting the public safety, this service is
provided free of charge.