@uhd - that was the first thing I did. In Stock app for Samsung gs4, I only see that option in the stock app. Is there a more overarching setting somewhere else? As I state above, I don't see any option to turn off wap push in Google messenger.
@mudguard - I was afraid of that. Thanks for checking.
@uhd, all - my belief is this is not a wap push message since it shows up even when rebooting the phone while in airplane mode - not connected to signal or wifi. I feel like this is some mistake or bug in some app that has the ability to access or write to sms. I think it's a blank sms message that is incorrectly formatted. There is no message in the sms when opened. Just this " 'WAP_PUSH_SI!' " in the outgoing sms phone number field. To me, it feels like a 'test' for a function in some app, but wasnt commented out or finished. It doesn't come up with the expected buttons that would appear if it was a delivered wap push SI message. As I understand it, there would be a link in the body and button choices to cancel or to follow the link. None of that's here. It's just an empty sms.
But I'm not a developer. Just a guess.
@all - I'm wondering if maybe this is due to google messenger? Did we three all have Google messenger already installed? I did. And it did recently update.