Iphone Flash SMS Disable?

[onza120]

Hello, One of my friends is playing a prank on me it seems, I keep getting these Flash SMS notifications, Im on IOS 7 Beta.


Is there anyway to disable them? I have checked sim services but there is nothing about Flash SMS.

Here is a screenshot of my problem.

http://img822.imageshack.us/img822/4962/b6ar.png