A "Flash SMS" or "Class 0 SMS" is a type of text message that appears directly on the recipient's screen without them needing to open it or take any action. It's often used for important or emergency messages because it demands immediate attention.
To send a Flash SMS, you typically need to have special software or access to certain features on your phone or through your service provider. The exact method can vary depending on your device and network. Here's a general outline of how it might work:
Access Flash SMS Feature: Check if your phone or messaging app supports sending Flash SMS. Some devices and messaging apps have this feature built-in, while others may require additional software or settings adjustment.