So if this setting is only on U.S. builds of the Samsung Messenger app, is there a way to install a version that would have these settings on an international phone? XDA forums seem like they should know. Would I need a different CSC coded firmware? Likewise I only have the "Roaming emergency alerts" option in Messenger, but I'm not roaming so I don't think it affects anything.
I have the G9730 (Hong Kong) variation and live in the U.S. Because I had two SCREAMING LOUD Amber alerts last week, one while sitting in a dentist chair , I looked into this.
Yes, it appears to be buried in the Samsung Messages app and not in Android itself, I guess it's a regional thing. All I can find though in these Settings is something labeled "Roaming emergency alerts." Now, if you go into "Notifications" yes, there -is- a setting for "Emergeny Alerts" (sound), but guess what? It's greyed out!! You can't change it!!
So I've switched off the Roaming setting and also turned off notifications on this app completely. I usually use the Google Messages anyway and there is no setting in there for alerts at all.