Bulk Flash SMS has been enabled on SMS Gateway Center panel.
Flash SMS is a kind of SMS which can be directly displayed on recipient's mobile phone with out saving it to the inbox directly. Some handsets provide options to save the sent Flash SMS and other do not. They only display the message and it will be displayed upon on the main screen and it gets lost once you deviate from that screen. You can read more about Flash SMS here.
Flash SMS can also be sent via SMS HTTP API. You just need to include Language parameter as Language=Flash in our SMS HTTP API.
If you have further clarifiations, please do not hesitate to contact us or call us on +919930447726.