OK, I can find a single beep mp3 file and convert it to AAC then rename to m4r extension.
Using ifunbox, I can upload it to the ringtones folder in the iPhone.
However, when the tone is selected as a ringtone, it keeps repeating .
I guess I need to create a ringtone with a beep followed by silence .
How can I do that pls ?
-keevill-