For the best experience turn off the battery saving mode.

Glossary

Flash SMS

Flash SMS is a notification that shows directly on the user’smobile screen and user does not need go to the mobile phone inbox to read the message as the message is also allocated to the SMS inbox.
Flash SMS is a VAS attribute to the standard SMS delivery. The main goal of using Flash SMS is to immediately catch the receiver’s attention.
The most common Flash SMS examples are emergency alerts and traffic alerts.